diff --git a/.gitignore b/.gitignore
index 7f7a1c453..b8b12bc11 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,18 +1,16 @@
 .venv/*
-openslides/.venv/
 *.pyc
 *.swp
-openslides/settings.py
-database.db
 *~
-extras/website/*
-extras/website-old/*
+settings.py
+database.sqlite
+
+# Package building
 docs/_build/*
 *.egg-info
 build/*
 dist/*
 .DS_Store
-settings.py
 versiontools*
 
 # Unit test / coverage reports
diff --git a/.travis.yml b/.travis.yml
index f91d92918..ade84bd88 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,9 @@
 language: python
 python:
-  - "2.5"
   - "2.6"
   - "2.7"
 install:
+  - easy_install https://www.djangoproject.com/download/1.5b2/tarball/
   - pip install -r requirements.txt --use-mirrors
   - python extras/scripts/create_local_settings.py
 script:
diff --git a/INSTALL.txt b/INSTALL.txt
index f57e7f00e..739431350 100644
--- a/INSTALL.txt
+++ b/INSTALL.txt
@@ -18,7 +18,7 @@ I. Installation on GNU/Linux and MacOSX using the Python Package Index (PyPI)
   1. Check requirements:
 
         Make sure that you have installed Python Programming Language 2
-        (>= 2.5) on your system.
+        (>= 2.6) on your system.
 
   2. Setup a virtual environment with virtualenv (optional):
 
@@ -65,7 +65,7 @@ II. Installation on GNU/Linux and MacOSX using the sources
 
         OpenSlides requires following programs, which should be
         installed first:
-          + Python Programming Language 2 (>= 2.5)
+          + Python Programming Language 2 (>= 2.6)
           + virtualenv (>= 1.4.1)
           + ReportLab Toolkit
           + Python Imaging Library (PIL)
@@ -141,7 +141,7 @@ portable version you should run the following install steps.
 
         The OpenSlides install requires following programs, which should be
         installed first:
-          + Python Programming Language 2 (>= 2.5)
+          + Python Programming Language 2 (>= 2.6)
           + Setuptools
 
      a) Download and run 32bit MSI installer from http://www.python.org/:
diff --git a/openslides/agenda/templates/agenda/base_agenda.html b/openslides/agenda/templates/agenda/base_agenda.html
index 1da6ca241..be70f6f40 100644
--- a/openslides/agenda/templates/agenda/base_agenda.html
+++ b/openslides/agenda/templates/agenda/base_agenda.html
@@ -5,15 +5,15 @@
 {% load staticfiles %}
 
 {% block submenu %}
-    {% url item_overview as url_itemoverview %}
-    {% url item_new as url_itemnew %}
+    {% url 'item_overview' as url_itemoverview %}
+    {% url 'item_new' as url_itemnew %}
     <h4 class="sectiontitle">{% trans "Agenda" %}</h4>
     <ul>
-        <li class="{% if request.path == url_itemoverview %}selected{% endif %}"><a href="{% url item_overview %}">{% trans "All items" %}</a></li>
+        <li class="{% if request.path == url_itemoverview %}selected{% endif %}"><a href="{% url 'item_overview' %}">{% trans "All items" %}</a></li>
         {% if perms.agenda.can_manage_agenda %}
-        <li class="{% active request '/agenda/new/' %}"><a href="{% url item_new %}">{% trans "New item" %}</a></li>
+        <li class="{% active request '/agenda/new/' %}"><a href="{% url 'item_new' %}">{% trans "New item" %}</a></li>
         {% endif %}
-        <li><a href="{% url print_agenda %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'Agenda as PDF' %}</a></li>
+        <li><a href="{% url 'print_agenda' %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'Agenda as PDF' %}</a></li>
     </ul>
 
     {# second submenu #}
@@ -22,20 +22,20 @@
         <h3>{{ item.title }}</h3>
             <ul>
             {# view item #}
-                {% url item_view item.id as url_itemview %}
-                <li class="{% if request.path == url_itemview %}selected{% endif %}"><a href="{% url item_view item.id  %}">{% trans 'View item' %}</a></li>
+                {% url 'item_view' item.id as url_itemview %}
+                <li class="{% if request.path == url_itemview %}selected{% endif %}"><a href="{% url 'item_view' item.id  %}">{% trans 'View item' %}</a></li>
 
             {% if perms.agenda.can_manage_agenda %}
                 {# edit item #}
-                    {% url item_edit item.id as url_itemedit %}
-                    <li class="{% if request.path == url_itemedit %}selected{% endif %}"><a href="{% url item_edit item.id  %}"><img src="{% static 'images/icons/edit.png' %}"> {% trans 'Edit item' %}</a></li>
+                    {% url 'item_edit' item.id as url_itemedit %}
+                    <li class="{% if request.path == url_itemedit %}selected{% endif %}"><a href="{% url 'item_edit' item.id  %}"><img src="{% static 'images/icons/edit.png' %}"> {% trans 'Edit item' %}</a></li>
                 {# delete item #}
-                    <li><a href="{% url item_delete item.id  %}"><img src="{% static 'images/icons/delete.png' %}"> {% trans 'Delete item' %}</a></li>
+                    <li><a href="{% url 'item_delete' item.id  %}"><img src="{% static 'images/icons/delete.png' %}"> {% trans 'Delete item' %}</a></li>
             {% endif %}
 
             {# activate item #}
             {% if perms.projector.can_manage_projector %}
-                <li><a href="{% url projector_activate_slide item.sid  %}"><img src="{% static 'images/icons/projector.png' %}"> {% trans 'Show item' %}</a></li>
+                <li><a href="{% url 'projector_activate_slide' item.sid  %}"><img src="{% static 'images/icons/projector.png' %}"> {% trans 'Show item' %}</a></li>
             {% endif %}
             </ul>
     {% endif %}
diff --git a/openslides/agenda/templates/agenda/config.html b/openslides/agenda/templates/agenda/config.html
index 0ef26b8d5..8a0eedb64 100644
--- a/openslides/agenda/templates/agenda/config.html
+++ b/openslides/agenda/templates/agenda/config.html
@@ -12,8 +12,8 @@
     <button class="button" type="submit">
         <span class="icon ok">{% trans 'Save' %}</span>
     </button>
-    <a href='{% url config_agenda %}'>
-    <button class="button" type="button" onclick="window.location='{% url config_agenda %}'">
+    <a href="{% url 'config_agenda' %}">
+    <button class="button" type="button" onclick="window.location='{% url 'config_agenda' %}'">
         <span class="icon cancel">{% trans 'Cancel' %}</span>
     </button>
     </a>
diff --git a/openslides/agenda/templates/agenda/edit.html b/openslides/agenda/templates/agenda/edit.html
index c91176fe4..f5060d1f0 100644
--- a/openslides/agenda/templates/agenda/edit.html
+++ b/openslides/agenda/templates/agenda/edit.html
@@ -26,8 +26,8 @@
         <button class="button" type="submit" name="apply">
             <span class="icon apply">{% trans 'Apply' %}</span>
         </button>
-        <a href='{% url item_overview %}'>
-        <button class="button" type="button" onclick="window.location='{% url item_overview %}'">
+        <a href="{% url 'item_overview' %}">
+        <button class="button" type="button" onclick="window.location='{% url 'item_overview' %}'">
             <span class="icon cancel">{% trans 'Cancel' %}</span>
         </button>
         </a>
diff --git a/openslides/agenda/templates/agenda/item_row.html b/openslides/agenda/templates/agenda/item_row.html
index a198f6bae..b5e3c084c 100644
--- a/openslides/agenda/templates/agenda/item_row.html
+++ b/openslides/agenda/templates/agenda/item_row.html
@@ -5,7 +5,7 @@
     <td>
         <span class="close_link{% if item.closed %} closed{% endif %}">
             {% if perms.agenda.can_manage_agenda %}
-               <a href="{% if item.closed %}{% url item_open item.id %}{% else %}{% url item_close item.id %}{% endif %}" title="{% trans 'Mark item as done' %}">
+               <a href="{% if item.closed %}{% url 'item_open' item.id %}{% else %}{% url 'item_close' item.id %}{% endif %}" title="{% trans 'Mark item as done' %}">
                     <span></span>
                 </a>
             {% elif item.closed %}
@@ -32,7 +32,7 @@
     <td>
         <span style="width: 1px; white-space: nowrap;">
         {% if perms.projector.can_manage_projector %}
-            <a class="activate_link {% if item.active %}active{% endif %}" href="{% url projector_activate_slide item.sid %}" title="{% trans 'Activate item' %}">
+            <a class="activate_link {% if item.active %}active{% endif %}" href="{% url 'projector_activate_slide' item.sid %}" title="{% trans 'Activate item' %}">
                 <span></span>
             </a>
         {% endif %}
@@ -40,7 +40,7 @@
             <a href="{% model_url item 'edit' %}"><img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit item' %}"></a>
             <a href="{% model_url item 'delete' %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete item' %}"></a>
             {% if not item.is_leaf_node %}
-                <a class="activate_link" href="{% url projector_activate_slide item.sid 'summary' %}">
+                <a class="activate_link" href="{% url 'projector_activate_slide' item.sid 'summary' %}">
                     <img src="{% static 'images/icons/summary.png' %}" title="{% trans 'Activate summary for this item' %}">
                 </a>
             {% endif %}
diff --git a/openslides/agenda/templates/agenda/overview.html b/openslides/agenda/templates/agenda/overview.html
index f847d9704..24ffaca65 100644
--- a/openslides/agenda/templates/agenda/overview.html
+++ b/openslides/agenda/templates/agenda/overview.html
@@ -44,7 +44,7 @@
        <div id="changed-order-message" style="display:none" class="notification warning">
            <em>{% trans "Do you want to save the changed order of agenda items?" %}<br>
                <input type="submit" value="{% trans 'Yes' %}">
-               <input type="button" onclick="window.location.href='{% url item_overview %}';" value="{% trans 'No' %}">
+               <input type="button" onclick="window.location.href='{% url 'item_overview' %}';" value="{% trans 'No' %}">
            </em>
        </div>
        {% endif %}
@@ -83,7 +83,7 @@
                 <td>
                 {% if perms.projector.can_manage_projector %}
                     <span>
-                        <a class="activate_link{% if active_sid == 'agenda' %} active{% endif %}" href="{% url projector_activate_slide 'agenda' %}" title="{% trans 'Activate item' %}">
+                        <a class="activate_link{% if active_sid == 'agenda' %} active{% endif %}" href="{% url 'projector_activate_slide' 'agenda' %}" title="{% trans 'Activate item' %}">
                             <span></span>
                         </a>
                     </span>
diff --git a/openslides/agenda/templates/agenda/widget.html b/openslides/agenda/templates/agenda/widget.html
index e638756b8..b1dc4bdd2 100644
--- a/openslides/agenda/templates/agenda/widget.html
+++ b/openslides/agenda/templates/agenda/widget.html
@@ -4,10 +4,10 @@
 
 <ul style="line-height: 180%">
     <li class="{% if agenda.active %}activeline{% endif %}">
-        <a href="{% url projector_activate_slide agenda.key %}" class="activate_link {% if agenda.active %}active{% endif %}">
+        <a href="{% url 'projector_activate_slide' agenda.key %}" class="activate_link {% if agenda.active %}active{% endif %}">
             <div></div>
         </a>
-        <a href="{% url projctor_preview_slide agenda.key %}" title="{% trans 'Preview' %}" class="icon preview right">
+        <a href="{% url 'projctor_preview_slide' agenda.key %}" title="{% trans 'Preview' %}" class="icon preview right">
             <span></span>
         </a>
         {{ agenda.name }}
@@ -17,7 +17,7 @@
 <ul style="line-height: 180%">
 {% for item in items %}
     <li class="{% if item.active %}activeline{% endif %}">
-        <a href="{% url projector_activate_slide item.sid %}" class="activate_link {% if item.active %}active{% endif %}">
+        <a href="{% url 'projector_activate_slide' item.sid %}" class="activate_link {% if item.active %}active{% endif %}">
             <div></div>
         </a>
         <a href="{% model_url item 'delete' %}" title="{% trans 'Delete' %}" class="icon delete right">
@@ -26,11 +26,11 @@
         <a href="{% model_url item 'edit' %}" title="{% trans 'Edit' %}" class="icon edit right">
             <span></span>
         </a>
-        <a href="{% url projctor_preview_slide item.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
+        <a href="{% url 'projctor_preview_slide' item.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
             <span></span>
         </a>
         {% if not item.is_leaf_node %}
-        <a class="activate_link right" href="{% url projector_activate_slide item.sid 'summary' %}">
+        <a class="activate_link right" href="{% url 'projector_activate_slide' item.sid 'summary' %}">
             <img src="{% static 'images/icons/summary.png' %}"
                 title="{% trans 'Activate summary for this item' %}"
                 style="padding-right: 2px;">
diff --git a/openslides/assignment/templates/assignment/base_assignment.html b/openslides/assignment/templates/assignment/base_assignment.html
index 5de21867f..e12d6fc03 100644
--- a/openslides/assignment/templates/assignment/base_assignment.html
+++ b/openslides/assignment/templates/assignment/base_assignment.html
@@ -10,14 +10,14 @@
 {% endblock %}
 
 {% block submenu %}
-    {% url assignment_overview as url_assignment_overview %}
+    {% url 'assignment_overview' as url_assignment_overview %}
     <h4 class="sectiontitle">{% trans "Elections" %}</h4>
     <ul>
-        <li class="{% if request.path == url_assignment_overview %}selected{% endif %}"><a href="{% url assignment_overview %}">{% trans "All elections" %}</a></li>
+        <li class="{% if request.path == url_assignment_overview %}selected{% endif %}"><a href="{% url 'assignment_overview' %}">{% trans "All elections" %}</a></li>
         {% if perms.assignment.can_manage_assignment %}
-            <li class="{% active request '/assignment/new' %}"><a href="{% url assignment_new %}">{% trans "New election" %}</a></li>
+            <li class="{% active request '/assignment/new' %}"><a href="{% url 'assignment_new' %}">{% trans "New election" %}</a></li>
         {% endif %}
-        <li><a href="{% url print_assignment %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'All elections as PDF' %}</a></li>
+        <li><a href="{% url 'print_assignment' %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'All elections as PDF' %}</a></li>
     </ul>
 
     {# second submenu #}
@@ -26,49 +26,49 @@
         <h3>{{assignment}}</h3>
         <ul>
             {# view assignemnt #}
-            {% url assignment_view assignment.id as url_assignmentview %}
+            {% url 'assignment_view' assignment.id as url_assignmentview %}
             <li class="{% if request.path == url_assignmentview %}selected{% endif %}">
-                <a href="{% url assignment_view assignment.id  %}">{% trans 'View election' %}</a>
+                <a href="{% url 'assignment_view' assignment.id  %}">{% trans 'View election' %}</a>
             </li>
 
             {% if perms.assignment.can_manage_assignment %}
 
                 {# edit assignemnt #}
-                {% url assignment_edit assignment.id as url_assignmentedit %}
+                {% url 'assignment_edit' assignment.id as url_assignmentedit %}
                 <li class="{% if request.path == url_assignmentedit %}selected{% endif %}">
-                    <a href="{% url assignment_edit assignment.id  %}"><img src="{% static 'images/icons/edit.png' %}"> {% trans 'Edit election' %}</a>
+                    <a href="{% url 'assignment_edit' assignment.id  %}"><img src="{% static 'images/icons/edit.png' %}"> {% trans 'Edit election' %}</a>
                 </li>
 
                 {# delete assignment #}
                 <li>
-                    <a href="{% url assignment_delete assignment.id  %}"><img src="{% static 'images/icons/delete.png' %}"> {% trans 'Delete election' %}</a>
+                    <a href="{% url 'assignment_delete' assignment.id  %}"><img src="{% static 'images/icons/delete.png' %}"> {% trans 'Delete election' %}</a>
                 </li>
             {% endif %}
 
             {# PDF #}
             <li>
-                <a href="{% url print_assignment assignment.id  %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'Election as PDF' %}</a>
+                <a href="{% url 'print_assignment' assignment.id  %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'Election as PDF' %}</a>
             </li>
 
             {# activate #}
             {% if perms.projector.can_manage_projector %}
             <li>
-                <a class="activate_link {% if item.active %}active{% endif %}" href="{% url projector_activate_slide assignment.sid  %}"><img src="{% static 'images/icons/projector.png' %}"> {% trans 'Show election' %}</a>
+                <a class="activate_link {% if item.active %}active{% endif %}" href="{% url 'projector_activate_slide' assignment.sid  %}"><img src="{% static 'images/icons/projector.png' %}"> {% trans 'Show election' %}</a>
             </li>
             {% endif %}
 
             {# agenda #}
             {% if perms.agenda.can_manage_agenda %}
             <li>
-                <a href="{% url assignment_create_agenda assignment.id  %}">{% trans 'New agenda item' %}</a>
+                <a href="{% url 'assignment_create_agenda' assignment.id  %}">{% trans 'New agenda item' %}</a>
             </li>
             {% endif %}
 
             {# polls #}
             {% if perms.assignment.can_manage_assignment %}
             {% for poll in polls %}
-                {% url assignment_poll_view poll.id as url_assignmentpollview %}
-                <li class="{% if request.path == url_assignmentpollview %}selected{% endif %}"><a href="{% url assignment_poll_view poll.id %}"><img src="{% static 'images/icons/edit.png' %}"> {{ forloop.counter }}. {% trans "ballot" %}</a></li>
+                {% url 'assignment_poll_view' poll.id as url_assignmentpollview %}
+                <li class="{% if request.path == url_assignmentpollview %}selected{% endif %}"><a href="{% url 'assignment_poll_view' poll.id %}"><img src="{% static 'images/icons/edit.png' %}"> {{ forloop.counter }}. {% trans "ballot" %}</a></li>
             {% endfor %}
             {% endif %}
         </ul>
diff --git a/openslides/assignment/templates/assignment/config.html b/openslides/assignment/templates/assignment/config.html
index 035de8384..52ba0598d 100644
--- a/openslides/assignment/templates/assignment/config.html
+++ b/openslides/assignment/templates/assignment/config.html
@@ -12,8 +12,8 @@
     <button class="button" type="submit">
         <span class="icon ok">{% trans 'Save' %}</span>
     </button>
-    <a href='{% url config_assignment %}'>
-    <button class="button" type="button" onclick="window.location='{% url config_assignment %}'">
+    <a href="{% url 'config_assignment' %}">
+    <button class="button" type="button" onclick="window.location='{% url 'config_assignment' %}'">
         <span class="icon cancel">{% trans 'Cancel' %}</span>
     </button>
     </a>
diff --git a/openslides/assignment/templates/assignment/edit.html b/openslides/assignment/templates/assignment/edit.html
index e1cc2e606..1d3b1c0a7 100644
--- a/openslides/assignment/templates/assignment/edit.html
+++ b/openslides/assignment/templates/assignment/edit.html
@@ -28,8 +28,8 @@
         <button class="button" type="submit" name="apply">
             <span class="icon apply">{% trans 'Apply' %}</span>
         </button>
-        <a href='{% url assignment_overview %}'>
-        <button class="button" type="button" onclick="window.location='{% url assignment_overview %}'">
+        <a href="{% url 'assignment_overview' %}">
+        <button class="button" type="button" onclick="window.location='{% url 'assignment_overview' %}'">
             <span class="icon cancel">{% trans 'Cancel' %}</span>
         </button>
         </a>
diff --git a/openslides/assignment/templates/assignment/overview.html b/openslides/assignment/templates/assignment/overview.html
index f94e4966c..c385be57e 100644
--- a/openslides/assignment/templates/assignment/overview.html
+++ b/openslides/assignment/templates/assignment/overview.html
@@ -30,7 +30,7 @@
     {% for assignment in assignments %}
         <tr class="{% cycle '' 'odd' %}
             {% if assignment.active %}activeline{% endif %}">
-            <td><a href="{% url assignment_view assignment.id %}">{{ assignment }}</a></td>
+            <td><a href="{% url 'assignment_view' assignment.id %}">{{ assignment }}</a></td>
             <td>
                 {% blocktrans with posts=assignment.posts context "Number of searched candidates for an election"%}posts: {{ posts }}{% endblocktrans %}
                 {% if assignment.status != 'fin' %}
@@ -42,15 +42,15 @@
             <td>
                 <span style="width: 1px; white-space: nowrap;">
                 {% if perms.projector.can_manage_projector %}
-                    <a class="activate_link {% if assignment.active %}active{% endif %}" href="{% url projector_activate_slide assignment.sid %}" title="{% trans 'Activate election' %}">
+                    <a class="activate_link {% if assignment.active %}active{% endif %}" href="{% url 'projector_activate_slide' assignment.sid %}" title="{% trans 'Activate election' %}">
                         <span></span>
                     </a>
                 {% endif %}
                 {% if perms.assignment.can_manage_assignment %}
-                    <a href="{% url assignment_edit assignment.id %}"><img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit election' %}"></a>
-                    <a href="{% url assignment_delete assignment.id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete election' %}"></a>
+                    <a href="{% url 'assignment_edit' assignment.id %}"><img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit election' %}"></a>
+                    <a href="{% url 'assignment_delete' assignment.id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete election' %}"></a>
                 {% endif %}
-                <a href="{% url print_assignment assignment.id %}" title="{% trans 'Election as PDF' %}"><img src="{% static 'images/icons/pdf.png' %}"></a>
+                <a href="{% url 'print_assignment' assignment.id %}" title="{% trans 'Election as PDF' %}"><img src="{% static 'images/icons/pdf.png' %}"></a>
                 </span>
             </td>
         </tr>
diff --git a/openslides/assignment/templates/assignment/poll_view.html b/openslides/assignment/templates/assignment/poll_view.html
index 64ff83866..7b41a247d 100644
--- a/openslides/assignment/templates/assignment/poll_view.html
+++ b/openslides/assignment/templates/assignment/poll_view.html
@@ -54,8 +54,8 @@
     </table>
 
     <p>
-    <a href='{% url print_assignment_poll poll.id %}'>
-    <button class="button" type="button" onclick="window.location='{% url print_assignment_poll poll.id %}'">
+    <a href="{% url 'print_assignment_poll' poll.id %}">
+    <button class="button" type="button" onclick="window.location='{% url 'print_assignment_poll' poll.id %}'">
         <span class="icon pdf">{% trans 'Ballot paper as PDF' %}</span>
     </button>
     </a>
@@ -68,8 +68,8 @@
     <button class="button" type="submit" name="apply">
         <span class="icon apply">{% trans 'Apply' %}</span>
     </button>
-    <a href='{% url assignment_view poll.assignment.id %}'>
-    <button class="button" type="button" onclick="window.location='{% url assignment_view poll.assignment.id %}'">
+    <a href="{% url 'assignment_view' poll.assignment.id %}">
+    <button class="button" type="button" onclick="window.location='{% url 'assignment_view' poll.assignment.id %}'">
         <span class="icon cancel">{% trans 'Cancel' %}</span>
     </button>
     </a>
diff --git a/openslides/assignment/templates/assignment/view.html b/openslides/assignment/templates/assignment/view.html
index 69063e7ff..c04bc8c86 100644
--- a/openslides/assignment/templates/assignment/view.html
+++ b/openslides/assignment/templates/assignment/view.html
@@ -19,11 +19,11 @@
     {% if perms.assignment.can_manage_assignment %}
         <div class="box">
         <h4>{% trans "Change status" %}:</h4>
-        <input type="radio" name="status" onclick="window.location.href='{% url assignment_set_status assignment.id 'sea' %}';"
+        <input type="radio" name="status" onclick="window.location.href='{% url 'assignment_set_status' assignment.id 'sea' %}';"
             {% if 'sea' in assignment.status %}checked{% endif %}>{% trans 'Searching for candidates' %}<br>
-        <input type="radio" name="status" onclick="window.location.href='{% url assignment_set_status assignment.id 'vot' %}';"
+        <input type="radio" name="status" onclick="window.location.href='{% url 'assignment_set_status' assignment.id 'vot' %}';"
             {% if 'vot' in assignment.status %}checked{% endif %}>{% trans 'Voting' %}<br>
-        <input type="radio" name="status" onclick="window.location.href='{% url assignment_set_status assignment.id 'fin' %}';"
+        <input type="radio" name="status" onclick="window.location.href='{% url 'assignment_set_status' assignment.id 'fin' %}';"
             {% if 'fin' in assignment.status %}checked{% endif %}>{% trans 'Finished' %}
         </div>
     {% endif %}
@@ -41,14 +41,14 @@
             {{ person }}
             {% if perms.assignment.can_manage_assignment %}
                 {% if assignment.status == "sea" or assignment.status == "vot" %}
-                    <a href="{% url assignment_delother assignment.id person.person_id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Remove candidate' %}"></a>
+                    <a href="{% url 'assignment_delother' assignment.id person.person_id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Remove candidate' %}"></a>
                 {% endif %}
             {% endif %}
             {% if person in assignment.elected %}
                 | <b>{% trans "elected" %}</b>
                 {% if perms.assignment.can_manage_assignment %}
                     {% if assignment.status == "sea" or assignment.status == "vot" %}
-                        <a href="{% url assignment_user_not_elected assignment.id person.person_id %}"><img src="{% static 'images/icons/dialog-cancel.png' %}" title="{% trans 'Mark candidate as not elected' %}"></a>
+                        <a href="{% url 'assignment_user_not_elected' assignment.id person.person_id %}"><img src="{% static 'images/icons/dialog-cancel.png' %}" title="{% trans 'Mark candidate as not elected' %}"></a>
                     {% endif %}
                 {% endif %}
             {% endif %}
@@ -64,13 +64,13 @@
         {% if perms.assignment.can_nominate_self %}
             <p>
             {% if user_is_candidate %}
-                <a href='{% url assignment_delrun assignment.id %}'>
+                <a href="{% url 'assignment_delrun' assignment.id %}">
                     <span class="button">
                         <span class="icon removeuser">{% trans 'Withdraw self candidature' %}</span>
                     </span>
                 </a>
             {% else %}
-                <a href='{% url assignment_run assignment.id %}'>
+                <a href="{% url 'assignment_run' assignment.id %}">
                     <span class="button">
                         <span class="icon adduser">{% trans 'Self candidature' %}</span>
                     </span>
@@ -83,7 +83,7 @@
             <label>{{ field.label }}:</label>
             <nobr>{{ field }}
             {% if perms.participant.can_see_participant and perms.participant.can_manage_participant %}
-            <a href="{% url user_new %}" target="_blank"><img src="{% static 'images/icons/add-user.png' %}" title="{% trans 'Add new participant' %}"></a>
+            <a href="{% url 'user_new' %}" target="_blank"><img src="{% static 'images/icons/add-user.png' %}" title="{% trans 'Add new participant' %}"></a>
             {% endif %}
             </nobr>
             {% endfor %}
@@ -103,7 +103,7 @@
     <ul>
     {% for person in blocked_candidates %}
         <li>
-            {{ person }}<a href="{% url assignment_delother assignment.id person.person_id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Remove candidate' %}"></a>
+            {{ person }}<a href="{% url 'assignment_delother' assignment.id person.person_id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Remove candidate' %}"></a>
         </li>
     {% empty %}
         <li>{% trans "No blocked candidates available." %}</li>
@@ -124,18 +124,18 @@
                 {% if perms.assignment.can_manage_assignment %}
                     <br>
                     <a class="publish_link {% if poll.published %}published{% endif %}"
-                    href="{% url assignment_poll_publish_status poll.id %}"
+                    href="{% url 'assignment_poll_publish_status' poll.id %}"
                     title="{% trans 'Publish/unpublish results' %}">
                     <span></span>
                     </a>
-                    <a href="{% url assignment_poll_view poll.id %}"><img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit' %}"></a>
-                    <a href="{% url assignment_poll_delete poll.id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete' %}"></a>
+                    <a href="{% url 'assignment_poll_view' poll.id %}"><img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit' %}"></a>
+                    <a href="{% url 'assignment_poll_delete' poll.id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete' %}"></a>
                 {% endif %}
             </th>
         {% endfor %}
         {% if assignment.candidates and perms.assignment.can_manage_assignment and assignment.status == "vot" %}
             <th>
-                <a href='{% url assignment_gen_poll assignment.id %}'>
+                <a href="{% url 'assignment_gen_poll' assignment.id %}">
                     <span class="button">
                        <span class="icon statistics">{% trans 'New ballot' %}</span>
                     </span>
@@ -149,7 +149,7 @@
         <td class="candidate">
             {% if candidate in assignment.elected %}
                 {% if perms.assignment.can_manage_assignment %}
-                    <a class="election_link elected" href='{% url assignment_user_not_elected assignment.id candidate.person_id %}'></a>
+                    <a class="election_link elected" href="{% url 'assignment_user_not_elected' assignment.id candidate.person_id %}"></a>
                 {% else %}
                     <a class="elected">
                         <img src="{% static 'images/icons/voting-yes.png' %}" title="{% trans 'Candidate is elected' %}">
@@ -157,7 +157,7 @@
                 {% endif %}
             {% else %}
                 {% if perms.assignment.can_manage_assignment %}
-                    <a class="election_link" href='{% url assignment_user_elected assignment.id candidate.person_id %}'></a>
+                    <a class="election_link" href="{% url 'assignment_user_elected' assignment.id candidate.person_id %}"></a>
                 {% endif %}
             {% endif %}
             {{ candidate }}
@@ -218,7 +218,7 @@
     {% else %}
     <i>{% trans "No results available." %}</i>
     {% if assignment.candidates and perms.assignment.can_manage_assignment and assignment.status == "vot" %}
-        <p><a href='{% url assignment_gen_poll assignment.id %}'>
+        <p><a href="{% url 'assignment_gen_poll' assignment.id %}">
         <span class="button">
            <span class="icon statistics">{% trans 'New ballot' %}</span>
         </span>
diff --git a/openslides/assignment/templates/assignment/widget.html b/openslides/assignment/templates/assignment/widget.html
index fa4abd55f..985db4e20 100644
--- a/openslides/assignment/templates/assignment/widget.html
+++ b/openslides/assignment/templates/assignment/widget.html
@@ -5,7 +5,7 @@
 <ul style="line-height: 180%">
 {% for assignment in assignments %}
     <li class="{% if assignment.active %}activeline{% endif %}">
-        <a href="{% url projector_activate_slide assignment.sid %}" class="activate_link {% if assignment.active %}active{% endif %}">
+        <a href="{% url 'projector_activate_slide' assignment.sid %}" class="activate_link {% if assignment.active %}active{% endif %}">
             <div></div>
         </a>
         <a href="{% model_url assignment 'delete' %}" title="{% trans 'Delete' %}" class="icon delete right">
@@ -14,7 +14,7 @@
         <a href="{% model_url assignment 'edit' %}" title="{% trans 'Edit' %}" class="icon edit right">
             <span></span>
         </a>
-        <a href="{% url projctor_preview_slide assignment.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
+        <a href="{% url 'projctor_preview_slide' assignment.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
             <span></span>
         </a>
         <a href="{% model_url assignment 'view' %}">{{ assignment }}</a>
diff --git a/openslides/config/templates/config/general.html b/openslides/config/templates/config/general.html
index 86912cc82..cf8ad7f41 100644
--- a/openslides/config/templates/config/general.html
+++ b/openslides/config/templates/config/general.html
@@ -55,8 +55,8 @@
     <button class="button" type="submit">
         <span class="icon ok">{% trans 'Save' %}</span>
     </button>
-    <a href='{% url config_general %}'>
-    <button class="button" type="button" onclick="window.location='{% url config_general %}'">
+    <a href="{% url 'config_general' %}">
+    <button class="button" type="button" onclick="window.location='{% url 'config_general' %}'">
         <span class="icon cancel">{% trans 'Cancel' %}</span>
     </button>
     </a>
diff --git a/openslides/global_settings.py b/openslides/global_settings.py
index adb51aea7..94f900059 100644
--- a/openslides/global_settings.py
+++ b/openslides/global_settings.py
@@ -88,12 +88,12 @@ TEMPLATE_LOADERS = (
 )
 
 MIDDLEWARE_CLASSES = (
-    'django.middleware.common.CommonMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.locale.LocaleMiddleware',
+    'django.middleware.common.CommonMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
     'openslides.participant.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
-    'django.middleware.locale.LocaleMiddleware',
 )
 
 ROOT_URLCONF = 'openslides.urls'
diff --git a/openslides/main.py b/openslides/main.py
index bc23fb3bd..d25305a4d 100755
--- a/openslides/main.py
+++ b/openslides/main.py
@@ -10,9 +10,6 @@
     :license: GNU GPL, see LICENSE for more details.
 """
 
-# for python 2.5 support
-from __future__ import with_statement
-
 import base64
 import ctypes
 import optparse
diff --git a/openslides/motion/templates/motion/base_motion.html b/openslides/motion/templates/motion/base_motion.html
index 1466bfcf2..0dc5846a6 100644
--- a/openslides/motion/templates/motion/base_motion.html
+++ b/openslides/motion/templates/motion/base_motion.html
@@ -5,17 +5,17 @@
 {% load staticfiles %}
 
 {% block submenu %}
-    {% url motion_overview as url_motionoverview %}
+    {% url 'motion_overview' as url_motionoverview %}
     <h4>{% trans "Motions" %}</h4>
     <ul>
-        <li class="{% if request.path == url_motionoverview %}selected{% endif %}"><a href="{% url motion_overview %}">{% trans "All motions" %}</a></li>
+        <li class="{% if request.path == url_motionoverview %}selected{% endif %}"><a href="{% url 'motion_overview' %}">{% trans "All motions" %}</a></li>
         {% if perms.motion.can_create_motion or perms.motion.can_manage_motion %}
-            <li class="{% active request '/motion/new' %}"><a href="{%  url motion_new %}">{% trans "New motion" %}</a></li>
+            <li class="{% active request '/motion/new' %}"><a href="{% url 'motion_new' %}">{% trans "New motion" %}</a></li>
         {% endif %}
         {% if perms.motion.can_manage_motion %}
-            <li class="{% active request '/motion/import' %}"><a href="{%  url motion_import %}">{% trans 'Import motions' %}</a></li>
+            <li class="{% active request '/motion/import' %}"><a href="{% url 'motion_import' %}">{% trans 'Import motions' %}</a></li>
         {% endif %}
-        <li><a href="{% url print_motions %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'All motions as PDF' %}</a></li>
+        <li><a href="{% url 'print_motions' %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'All motions as PDF' %}</a></li>
     </ul>
 
     {# second submenu #}
@@ -30,35 +30,35 @@
         </h3>
         <ul>
         {# view motion #}
-            {% url motion_view motion.id as url_motionview %}
-            <li class="{% if request.path == url_motionview %}selected{% endif %}"><a href="{% url motion_view motion.id  %}">{% trans 'View motion' %}</a></li>
+            {% url 'motion_view' motion.id as url_motionview %}
+            <li class="{% if request.path == url_motionview %}selected{% endif %}"><a href="{% url 'motion_view' motion.id  %}">{% trans 'View motion' %}</a></li>
         {# edit motion #}
             {% if "edit" in actions %}
-            {% url motion_edit motion.id as url_motionedit %}
-            <li class="{% if request.path == url_motionedit %}selected{% endif %}"><a href="{% url motion_edit motion.id  %}"><img src="{% static 'images/icons/edit.png' %}"> {% trans 'Edit motion' %}</a></li>
+            {% url 'motion_edit' motion.id as url_motionedit %}
+            <li class="{% if request.path == url_motionedit %}selected{% endif %}"><a href="{% url 'motion_edit' motion.id  %}"><img src="{% static 'images/icons/edit.png' %}"> {% trans 'Edit motion' %}</a></li>
             {% endif %}
         {# delete motion #}
             {% if "delete" in actions %}
-            <li><a href="{% url motion_delete motion.id  %}"><img src="{% static 'images/icons/delete.png' %}"> {% trans 'Delete motion' %}</a></li>
+            <li><a href="{% url 'motion_delete' motion.id  %}"><img src="{% static 'images/icons/delete.png' %}"> {% trans 'Delete motion' %}</a></li>
             {% endif %}
         {# PDF #}
-            <li><a href="{% url print_motion motion.id  %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'Motion as PDF' %}</a></li>
+            <li><a href="{% url 'print_motion' motion.id  %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'Motion as PDF' %}</a></li>
         {# activate and polls #}
             {% if perms.projector.can_manage_projector %}
                 <li>
-                    <a class="activate_link {% if item.active %}active{% endif %}" href="{% url projector_activate_slide motion.sid  %}"><img src="{% static 'images/icons/projector.png' %}"> {% trans 'Show Motion' %}</a>
+                    <a class="activate_link {% if item.active %}active{% endif %}" href="{% url 'projector_activate_slide' motion.sid  %}"><img src="{% static 'images/icons/projector.png' %}"> {% trans 'Show Motion' %}</a>
                 </li>
             {% endif %}
             {% if perms.motion.can_manage_motion %}
                 {% for poll in motion.polls %}
-                    {% url motion_poll_view poll.id as url_motionpollview %}
-                    <li class="{% if request.path == url_motionpollview %}selected{% endif %}"><a href="{% url motion_poll_view poll.id %}"><img src="{% static 'images/icons/edit.png' %}"> {{ forloop.counter }}. {% trans "Vote" %}</a></li>
+                    {% url 'motion_poll_view' poll.id as url_motionpollview %}
+                    <li class="{% if request.path == url_motionpollview %}selected{% endif %}"><a href="{% url 'motion_poll_view' poll.id %}"><img src="{% static 'images/icons/edit.png' %}"> {{ forloop.counter }}. {% trans "Vote" %}</a></li>
                 {% endfor %}
             {% endif %}
         {# Agenda Item #}
             {% if perms.agenda.can_manage_agenda %}
             <li>
-                <a href="{% url motion_create_agenda motion.id  %}">{% trans 'New agenda item' %}</a>
+                <a href="{% url 'motion_create_agenda' motion.id  %}">{% trans 'New agenda item' %}</a>
             </li>
             {% endif %}
         </ul>
diff --git a/openslides/motion/templates/motion/config.html b/openslides/motion/templates/motion/config.html
index 8f2ac89b8..42e064444 100644
--- a/openslides/motion/templates/motion/config.html
+++ b/openslides/motion/templates/motion/config.html
@@ -12,8 +12,8 @@
     <button class="button" type="submit">
         <span class="icon ok">{% trans 'Save' %}</span>
     </button>
-    <a href='{% url config_motion %}'>
-    <button class="button" type="button" onclick="window.location='{% url config_motion %}'">
+    <a href="{% url 'config_motion' %}">
+    <button class="button" type="button" onclick="window.location='{% url 'config_motion' %}'">
         <span class="icon cancel">{% trans 'Cancel' %}</span>
     </button>
     </a>
diff --git a/openslides/motion/templates/motion/edit.html b/openslides/motion/templates/motion/edit.html
index ec56a07a1..7c5f09ed4 100644
--- a/openslides/motion/templates/motion/edit.html
+++ b/openslides/motion/templates/motion/edit.html
@@ -28,8 +28,8 @@
         <button class="button" type="submit" name="apply">
             <span class="icon apply">{% trans 'Apply' %}</span>
         </button>
-        <a href='{% url motion_overview %}'>
-        <button class="button" type="button" onclick="window.location='{% url motion_overview %}'">
+        <a href="{% url 'motion_overview' %}">
+        <button class="button" type="button" onclick="window.location='{% url 'motion_overview' %}'">
             <span class="icon cancel">{% trans 'Cancel' %}</span>
         </button>
         </a>
diff --git a/openslides/motion/templates/motion/import.html b/openslides/motion/templates/motion/import.html
index 1c4607693..8a0d8eab1 100644
--- a/openslides/motion/templates/motion/import.html
+++ b/openslides/motion/templates/motion/import.html
@@ -25,8 +25,8 @@
         <button class="button" type="submit">
             <span class="icon import">{% trans 'Import' %}</span>
         </button>
-        <a href="{% url motion_overview%}">
-        <button class="button" type="button"  onclick="window.location='{% url motion_overview %}'">
+        <a href="{% url 'motion_overview' %}">
+        <button class="button" type="button"  onclick="window.location='{% url 'motion_overview' %}'">
             <span class="icon cancel">{% trans 'Cancel' %}</span>
         </button>
         </a>
diff --git a/openslides/motion/templates/motion/overview.html b/openslides/motion/templates/motion/overview.html
index 38de7d40e..e11c6f2b5 100644
--- a/openslides/motion/templates/motion/overview.html
+++ b/openslides/motion/templates/motion/overview.html
@@ -47,7 +47,7 @@
         <tr class="{% cycle '' 'odd' %}
             {% if motion.active %}activeline{% endif %}">
             <td>{% if motion.number %}{{ motion.number }}{% else %}-{% endif %}</td>
-            <td><a href="{% url motion_view motion.id %}">{{ motion.public_version.title }}</a></td>
+            <td><a href="{% url 'motion_view' motion.id %}">{{ motion.public_version.title }}</a></td>
         {% if min_supporters > 0 %}
             <td>{{ motion.count_supporters }}</td>
         {% endif %}
@@ -64,17 +64,17 @@
             <td>
                 <span style="width: 1px; white-space: nowrap;">
                 {% if perms.projector.can_manage_projector %}
-                    <a class="activate_link {% if motion.active %}active{% endif %}" href="{% url projector_activate_slide motion.sid %}" title="{% trans 'Activate motion' %}">
+                    <a class="activate_link {% if motion.active %}active{% endif %}" href="{% url 'projector_activate_slide' motion.sid %}" title="{% trans 'Activate motion' %}">
                         <span></span>
                     </a>
                 {% endif %}
                 {% if perms.motion.can_manage_motion %}
-                    <a href="{% url motion_edit motion.id %}"><img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit motion' %}"></a>
+                    <a href="{% url 'motion_edit' motion.id %}"><img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit motion' %}"></a>
                     {% if "delete" in useractions %}
-                    <a href="{% url motion_delete motion.id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete motion' %}"></a>
+                    <a href="{% url 'motion_delete' motion.id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete motion' %}"></a>
                     {% endif %}
                 {% endif %}
-                <a href="{% url print_motion motion.id  %}" title="{% trans 'Motion as PDF' %}"><img src="{% static 'images/icons/pdf.png' %}"></a>
+                <a href="{% url 'print_motion' motion.id  %}" title="{% trans 'Motion as PDF' %}"><img src="{% static 'images/icons/pdf.png' %}"></a>
                 </span>
             </td>
         </tr>
diff --git a/openslides/motion/templates/motion/poll_view.html b/openslides/motion/templates/motion/poll_view.html
index b21236f23..9894cd51e 100644
--- a/openslides/motion/templates/motion/poll_view.html
+++ b/openslides/motion/templates/motion/poll_view.html
@@ -40,8 +40,8 @@
         {{ post_form }}
 
         <p>
-        <a href='{% url print_motion_poll poll.id %}'>
-        <button class="button" type="button" onclick="window.location='{% url print_motion_poll poll.id %}'">
+        <a href="{% url 'print_motion_poll' poll.id %}">
+        <button class="button" type="button" onclick="window.location='{% url 'print_motion_poll' poll.id %}'">
             <span class="icon pdf">{% trans 'Ballot paper as PDF' %}</span>
         </button>
         </a>
@@ -54,8 +54,8 @@
         <button class="button" type="submit" name="apply">
             <span class="icon apply">{% trans 'Apply' %}</span>
         </button>
-        <a href='{% url motion_view motion.id %}'>
-        <button class="button" type="button" onclick="window.location='{% url motion_view motion.id %}'">
+        <a href="{% url 'motion_view' motion.id %}">
+        <button class="button" type="button" onclick="window.location='{% url 'motion_view' motion.id %}'">
             <span class="icon cancel">{% trans 'Cancel' %}</span>
         </button>
         </a>
diff --git a/openslides/motion/templates/motion/view.html b/openslides/motion/templates/motion/view.html
index f991c88b5..3d2ad91b1 100644
--- a/openslides/motion/templates/motion/view.html
+++ b/openslides/motion/templates/motion/view.html
@@ -46,7 +46,7 @@
         {% if not polls.exists %}
             {% if perms.motion.can_manage_motion %}
                 {% if "genpoll" in actions %}
-                <a href='{% url motion_gen_poll motion.id %}'>
+                <a href="{% url 'motion_gen_poll' motion.id %}">
                     <span class="button">
                         <span class="icon statistics">{% trans 'New vote' %}</span>
                     </span>
@@ -64,10 +64,10 @@
             <li>
                 {% if perms.motion.can_manage_motion %}
                     <strong>{{ forloop.counter }}. {% trans "Vote" %} </strong>
-                    <a class="icon edit" href="{% url motion_poll_view poll.id %}" title="{% trans 'Edit Vote' %}">
+                    <a class="icon edit" href="{% url 'motion_poll_view' poll.id %}" title="{% trans 'Edit Vote' %}">
                             <span></span>
                     </a>
-                    <a class="icon delete" href="{% url motion_poll_delete poll.id %}" title="{% trans 'Delete Vote' %}">
+                    <a class="icon delete" href="{% url 'motion_poll_delete' poll.id %}" title="{% trans 'Delete Vote' %}">
                         <span></span>
                     </a>
                 {% elif poll.has_votes %}
@@ -87,7 +87,7 @@
                     {% if perms.motion.can_manage_motion %}
                         {% if forloop.last %}
                         {% if "genpoll" in actions %}
-                        <a href='{% url motion_gen_poll motion.id %}'>
+                        <a href="{% url 'motion_gen_poll' motion.id %}">
                             <span class="button"><span class="icon statistics">{% trans 'New vote' %}</span></span>
                         </a>
                         {% endif %}
@@ -95,7 +95,7 @@
                     {% endif %}
                 {% else %}
                     {% if perms.motion.can_manage_motion %}
-                        <a href='{% url motion_poll_view poll.id %}'>
+                        <a href="{% url 'motion_poll_view' poll.id %}">
                             <span class="button"><span class="icon statistics">{% trans 'Enter result' %}</span></span>
                         </a>
                      {% endif %}
@@ -112,7 +112,7 @@
     <p></p>
     {% if "wit" in actions and user == motion.submitter.user %}
     <p></p>
-        <a href='{% url motion_set_status motion.id 'wit' %}'>
+        <a href="{% url 'motion_set_status' motion.id 'wit' %}">
             <span class="button"><span class="icon revert">{% trans 'Withdraw' %}</span></span>
         </a>
     {% endif %}
@@ -120,13 +120,13 @@
     {% if perms.motion.can_support_motion and min_supporters > 0 %}
         {% if "unsupport" in actions %}
         <p></p>
-        <a href='{% url motion_unsupport motion.id %}'>
+        <a href="{% url 'motion_unsupport' motion.id %}">
             <span class="button"><span class="icon remove">{% trans 'Unsupport' %}</span></span>
         </a>
         {% endif %}
         {% if "support" in actions %}
         <p></p>
-        <a href='{% url motion_support motion.id %}'>
+        <a href="{% url 'motion_support' motion.id %}">
             <span class="button"><span class="icon add">{% trans 'Support' %}</span></span>
         </a>
         {% endif %}
@@ -145,16 +145,16 @@
     {% if "pub" in actions or "per" in actions or "nop" in actions or "setnumber" in actions %}
         <h4>{% trans "Formal validation" %}:</h4>
         {% if "pub" in actions %}
-        <a href='{% url motion_set_status motion.id 'pub' %}'><span class="button"><span class="icon ok-blue">{% trans 'Publish' %}</span></span></a>
+        <a href="{% url 'motion_set_status' motion.id 'pub' %}"><span class="button"><span class="icon ok-blue">{% trans 'Publish' %}</span></span></a>
         {% endif %}
         {% if "per" in actions %}
-        <a href='{% url motion_permit motion.id %}'><span class="button"><span class="icon ok-blue">{% trans 'Permit' %}</span></span></a>
+        <a href="{% url 'motion_permit' motion.id %}"><span class="button"><span class="icon ok-blue">{% trans 'Permit' %}</span></span></a>
         {% endif %}
         {% if "nop" in actions %}
-        <a href='{% url motion_notpermit motion.id %}'><span class="button"><span class="icon reject">{% trans 'Not permit (reject)' %}</span></span></a>
+        <a href="{% url 'motion_notpermit' motion.id %}"><span class="button"><span class="icon reject">{% trans 'Not permit (reject)' %}</span></span></a>
         {% endif %}
         {% if "setnumber" in actions %}
-        <a href='{% url motion_set_number motion.id %}'><span class="button"><span class="icon number">{% trans 'Set number' %}</span></span></a>
+        <a href="{% url 'motion_set_number' motion.id %}"><span class="button"><span class="icon number">{% trans 'Set number' %}</span></span></a>
         {% endif %}
         </p>
     {% endif %}
@@ -163,12 +163,12 @@
     {% if "acc" in actions or "rej" in actions %}
         <h4>{% trans "Result after vote" %}:</h4>
         {% if "acc" in actions %}
-        <a href='{% url motion_set_status motion.id 'acc' %}'>
+        <a href="{% url 'motion_set_status' motion.id 'acc' %}">
             <span class="button"><span class="icon done">{% trans 'Accepted' %}</span></span>
         </a>
         {% endif %}
         {% if "rej" in actions %}
-        <a href='{% url motion_set_status motion.id 'rej' %}'>
+        <a href="{% url 'motion_set_status' motion.id 'rej' %}">
             <span class="button"><span class="icon reject">{% trans 'Rejected' %}</span></span>
         </a>
         {% endif %}
@@ -177,22 +177,22 @@
     {% if "adj" in actions or "noc" in actions or "com" in actions or "wit" in actions %}
         <h4>{% trans 'Result after debate' %}:</h4>
         {% if "adj" in actions %}
-        <a href='{% url motion_set_status motion.id 'adj' %}'><span class="button">{% trans 'Adjourned' %}</span></a><br>
+        <a href="{% url 'motion_set_status' motion.id 'adj' %}"><span class="button">{% trans 'Adjourned' %}</span></a><br>
         {% endif %}
         {% if "noc" in actions %}
-        <a href='{% url motion_set_status motion.id 'noc' %}'><span class="button">{% trans 'Not Concerned' %}</span></a><br>
+        <a href="{% url 'motion_set_status' motion.id 'noc' %}'><span class="button">{% trans 'Not Concerned' %}</span></a><br>
         {% endif %}
         {% if "com" in actions %}
-        <a href='{% url motion_set_status motion.id 'com' %}'><span class="button">{% trans 'Commited a bill' %}</span></a><br>
+        <a href="{% url 'motion_set_status' motion.id 'com' %}'><span class="button">{% trans 'Commited a bill' %}</span></a><br>
         {% endif %}
         {% if "wit" in actions %}
-        <a href='{% url motion_set_status motion.id 'wit' %}'><span class="button">{% trans 'Withdrawed by submitter' %}</span></a>
+        <a href="{% url 'motion_set_status' motion.id 'wit' %}'><span class="button">{% trans 'Withdrawed by submitter' %}</span></a>
         {% endif %}
     {% endif %}
     <p></p>
     <hr>
     <h4>{% trans "For Administration only:" %}</h4>
-    <a href='{% url motion_reset motion.id %}'>
+    <a href="{% url 'motion_reset' motion.id %}">
         <span class="button"><span class="icon undo">{% trans 'Reset' %}</span></span>
     </a>
     </div>
@@ -216,9 +216,9 @@
     {% if motion.public_version != motion.last_version %}
         &#8901;
         {% if version == motion.public_version %}
-            {% trans "This is not the newest version." %} <a href="{% url motion_view_newest motion.id %}">{% trans "Go to version" %} {{ motion.last_version.aid }}.</a>
+            {% trans "This is not the newest version." %} <a href="{% url 'motion_view_newest' motion.id %}">{% trans "Go to version" %} {{ motion.last_version.aid }}.</a>
         {% else %}
-            {% trans "This is not the authorized version." %} <a href="{% url motion_view motion.id %}">{% trans "Go to version" %} {{ motion.public_version.aid }}.</a>
+            {% trans "This is not the authorized version." %} <a href="{% url 'motion_view' motion.id %}">{% trans "Go to version" %} {{ motion.public_version.aid }}.</a>
         {% endif %}
     {% endif %}
 
@@ -256,10 +256,10 @@
              <img title="{% trans 'Version authorized' %}" src="{% static 'images/icons/accept.png' %}">
         {% else %}
              {% if perms.motion.can_manage_motion %}
-                 <a href="{% url motion_version_permit revision.id %}"><img title="{% trans 'Permit Version' %}" src="{% static 'images/icons/accept-grey.png' %}"></a>
+                 <a href="{% url 'motion_version_permit' revision.id %}"><img title="{% trans 'Permit Version' %}" src="{% static 'images/icons/accept-grey.png' %}"></a>
              {% endif %}
              {% if not revision.rejected and revision.id > motion.permitted.id and perms.motion.can_manage_motion %}
-                 <a href="{% url motion_version_reject revision.id %}"><img title="{% trans 'Reject Version' %}" src="{% static 'images/icons/reject-grey.png' %}"></a>
+                 <a href="{% url 'motion_version_reject' revision.id %}"><img title="{% trans 'Reject Version' %}" src="{% static 'images/icons/reject-grey.png' %}"></a>
              {% endif %}
         {% endif %}
         {% if revision.rejected %}
diff --git a/openslides/motion/templates/motion/widget.html b/openslides/motion/templates/motion/widget.html
index 0495d7ac9..c0796de89 100644
--- a/openslides/motion/templates/motion/widget.html
+++ b/openslides/motion/templates/motion/widget.html
@@ -5,7 +5,7 @@
 <ul style="line-height: 180%">
 {% for motion in motions %}
     <li class="{% if motion.active %}activeline{% endif %}">
-        <a href="{% url projector_activate_slide motion.sid %}" class="activate_link {% if motion.active %}active{% endif %}">
+        <a href="{% url 'projector_activate_slide' motion.sid %}" class="activate_link {% if motion.active %}active{% endif %}">
             <div></div>
         </a>
         <a href="{% model_url motion 'delete' %}" title="{% trans 'Delete' %}" class="icon delete right">
@@ -14,7 +14,7 @@
         <a href="{% model_url motion 'edit' %}" title="{% trans 'Edit' %}" class="icon edit right">
             <span></span>
         </a>
-        <a href="{% url projctor_preview_slide motion.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
+        <a href="{% url 'projctor_preview_slide' motion.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
             <span></span>
         </a>
         <a href="{% model_url motion 'view' %}">
diff --git a/openslides/motion/views.py b/openslides/motion/views.py
index 76b2ba4c3..deff7eaef 100644
--- a/openslides/motion/views.py
+++ b/openslides/motion/views.py
@@ -10,16 +10,10 @@
     :license: GNU GPL, see LICENSE for more details.
 """
 
-# for python 2.5 support
-from __future__ import with_statement
-
 import csv
 import os
 
-try:
-    from urlparse import parse_qs
-except ImportError:  # python <= 2.5
-    from cgi import parse_qs
+from urlparse import parse_qs
 
 from reportlab.lib import colors
 from reportlab.lib.units import cm
diff --git a/openslides/participant/api.py b/openslides/participant/api.py
index fb5325628..f7b5a80a2 100644
--- a/openslides/participant/api.py
+++ b/openslides/participant/api.py
@@ -10,9 +10,6 @@
     :license: GNU GPL, see LICENSE for more details.
 """
 
-# for python 2.5 support
-from __future__ import with_statement
-
 from random import choice
 import csv
 
diff --git a/openslides/participant/forms.py b/openslides/participant/forms.py
index 8085f313f..854abe91e 100644
--- a/openslides/participant/forms.py
+++ b/openslides/participant/forms.py
@@ -13,6 +13,7 @@
 from django import forms
 from django.contrib.auth.models import Permission
 from django.utils.translation import ugettext_lazy as _
+from django.conf import settings
 
 from openslides.utils.forms import (
     CssClassMixin, LocalizedModelMultipleChoiceField)
@@ -101,6 +102,8 @@ class GroupForm(forms.ModelForm, CssClassMixin):
 
 
 class UsersettingsForm(forms.ModelForm, CssClassMixin):
+    language = forms.ChoiceField(choices=settings.LANGUAGES)
+
     class Meta:
         model = User
         fields = ('username', 'first_name', 'last_name', 'gender', 'email', 'committee', 'about_me')
diff --git a/openslides/participant/templates/participant/base_participant.html b/openslides/participant/templates/participant/base_participant.html
index 751c02a3a..53f1d3012 100644
--- a/openslides/participant/templates/participant/base_participant.html
+++ b/openslides/participant/templates/participant/base_participant.html
@@ -5,26 +5,26 @@
 {% load staticfiles %}
 
 {% block submenu %}
-    {% url user_overview as url_users %}
-    {% url user_new as url_usernew %}
-    {% url user_group_overview as url_usergroups %}
-    {% url user_import as url_userimport %}
+    {% url 'user_overview' as url_users %}
+    {% url 'user_new' as url_usernew %}
+    {% url 'user_group_overview' as url_usergroups %}
+    {% url 'user_import' as url_userimport %}
     <h4 class="sectiontitle">{% trans "Participants" %}</h4>
     <ul>
         {% if perms.participant.can_see_participant %}
-        <li class="{% if request.path == url_users %}selected{% endif %}"><a href="{% url user_overview %}">{% trans "All participants" %}</a></li>
+        <li class="{% if request.path == url_users %}selected{% endif %}"><a href="{% url 'user_overview' %}">{% trans "All participants" %}</a></li>
         {% endif %}
         {% if perms.participant.can_manage_participant %}
-        <li class="{% active request url_usernew %}"><a href="{%  url user_new %}">{% trans "New participant" %}</a></li>
-        <li class="{% if request.path == url_usergroups %}selected{% endif %}"><a href="{%  url user_group_overview %}">{% trans "All groups" %}</a></li>
-        <li class="{% active request '/participant/group/new' %}"><a href="{%  url user_group_new %}">{% trans "New group" %}</a></li>
-        <li class="{% if request.path == url_userimport %}selected{% endif %}"><a href="{% url user_import %}"> {% trans 'Import participants' %}</a></li>
+        <li class="{% active request url_usernew %}"><a href="{% url 'user_new' %}">{% trans "New participant" %}</a></li>
+        <li class="{% if request.path == url_usergroups %}selected{% endif %}"><a href="{% url 'user_group_overview' %}">{% trans "All groups" %}</a></li>
+        <li class="{% active request '/participant/group/new' %}"><a href="{% url 'user_group_new' %}">{% trans "New group" %}</a></li>
+        <li class="{% if request.path == url_userimport %}selected{% endif %}"><a href="{% url 'user_import' %}"> {% trans 'Import participants' %}</a></li>
         {% endif %}
         {% if perms.participant.can_see_participant %}
-        <li><a href="{% url user_print %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'List of participants as PDF' %}</a></li>
+        <li><a href="{% url 'user_print' %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'List of participants as PDF' %}</a></li>
         {% endif %}
         {% if perms.participant.can_manage_participant %}
-        <li><a href="{% url print_passwords %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'First time passwords as PDF' %}</a></li>
+        <li><a href="{% url 'print_passwords' %}"><img src="{% static 'images/icons/pdf.png' %}"> {% trans 'First time passwords as PDF' %}</a></li>
         {% endif %}
     </ul>
 
diff --git a/openslides/participant/templates/participant/config.html b/openslides/participant/templates/participant/config.html
index 1a68ca591..3c1ed6199 100644
--- a/openslides/participant/templates/participant/config.html
+++ b/openslides/participant/templates/participant/config.html
@@ -12,8 +12,8 @@
     <button class="button" type="submit">
         <span class="icon ok">{% trans 'Save' %}</span>
     </button>
-    <a href='{% url config_participant %}'>
-    <button class="button" type="button" onclick="window.location='{% url config_participant %}'">
+    <a href="{% url 'config_participant' %}">
+    <button class="button" type="button" onclick="window.location='{% url 'config_participant' %}'">
         <span class="icon cancel">{% trans 'Cancel' %}</span>
     </button>
     </a>
diff --git a/openslides/participant/templates/participant/edit.html b/openslides/participant/templates/participant/edit.html
index da910b19e..6919a4221 100644
--- a/openslides/participant/templates/participant/edit.html
+++ b/openslides/participant/templates/participant/edit.html
@@ -23,7 +23,7 @@
         {{ form.as_p }}
         {% if edit_user %}
             <p>
-                <a href="{% url user_reset_password edit_user.id %}">{% trans 'Reset to First Password' %}</a>
+                <a href="{% url 'user_reset_password' edit_user.id %}">{% trans 'Reset to First Password' %}</a>
             </p>
         {% endif %}
         <p>
@@ -33,8 +33,8 @@
             <button class="button" type="submit" name="apply">
                 <span class="icon apply">{% trans 'Apply' %}</span>
             </button>
-            <a href='{% url user_overview %}'>
-                <button class="button" type="button" onclick="window.location='{% url user_overview %}'">
+            <a href='{% url "user_overview" %}'>
+                <button class="button" type="button" onclick="window.location='{% url 'user_overview' %}'">
                     <span class="icon cancel">{% trans 'Cancel' %}</span>
                 </button>
             </a>
diff --git a/openslides/participant/templates/participant/group_edit.html b/openslides/participant/templates/participant/group_edit.html
index 1619b18c8..7638a360e 100644
--- a/openslides/participant/templates/participant/group_edit.html
+++ b/openslides/participant/templates/participant/group_edit.html
@@ -27,8 +27,8 @@
         <button class="button" type="submit" name="apply">
             <span class="icon apply">{% trans 'Apply' %}</span>
         </button>
-        <a href='{% url user_group_overview %}'>
-        <button class="button" type="button" onclick="window.location='{% url user_group_overview %}'">
+        <a href='{% url "user_group_overview" %}'>
+        <button class="button" type="button" onclick="window.location='{% url 'user_group_overview' %}'">
             <span class="icon cancel">{% trans 'Cancel' %}</span>
         </button>
         </a>
diff --git a/openslides/participant/templates/participant/group_overview.html b/openslides/participant/templates/participant/group_overview.html
index 550fe2f56..cb91709be 100644
--- a/openslides/participant/templates/participant/group_overview.html
+++ b/openslides/participant/templates/participant/group_overview.html
@@ -16,9 +16,9 @@
     {% for group in groups %}
         <tr class="{% cycle '' 'odd' %}">
             <td><a href="{% model_url group 'view' %}">{{ group.name }}</a></td>
-            <td><a href="{% url user_group_edit group.id %}"><img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit group' %}"></a>
+            <td><a href="{% url 'user_group_edit' group.id %}"><img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit group' %}"></a>
             {% if group.name|lower != 'anonymous' and group.name|lower != 'registered' %}
-            <a href="{% url user_group_delete group.id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete group' %}"></a>
+            <a href="{% url 'user_group_delete' group.id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete group' %}"></a>
             {% endif %}
             </td>
         </tr>
diff --git a/openslides/participant/templates/participant/group_widget.html b/openslides/participant/templates/participant/group_widget.html
index 5c6e285a7..88a2eb91c 100644
--- a/openslides/participant/templates/participant/group_widget.html
+++ b/openslides/participant/templates/participant/group_widget.html
@@ -5,7 +5,7 @@
 {% for group in groups %}
     {% if group.name != 'Anonymous' and group.name != 'Registered' %}
     <li class="{% if group.active %}activeline{% endif %}">
-        <a href="{% url projector_activate_slide group.sid %}" class="activate_link {% if group.active %}active{% endif %}">
+        <a href="{% url 'projector_activate_slide' group.sid %}" class="activate_link {% if group.active %}active{% endif %}">
             <div></div>
         </a>
         <a href="{% model_url group 'delete' %}" title="{% trans 'Delete' %}" class="icon delete right">
@@ -14,7 +14,7 @@
         <a href="{% model_url group 'edit' %}" title="{% trans 'Edit' %}" class="icon edit right">
             <span></span>
         </a>
-        <a href="{% url projctor_preview_slide group.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
+        <a href="{% url 'projctor_preview_slide' group.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
             <span></span>
         </a>
         <a href="{% model_url group 'view' %}">{{ group }}</a>
diff --git a/openslides/participant/templates/participant/import.html b/openslides/participant/templates/participant/import.html
index 4b1777332..2cd720cfe 100644
--- a/openslides/participant/templates/participant/import.html
+++ b/openslides/participant/templates/participant/import.html
@@ -23,8 +23,8 @@
         <button class="button" type="submit">
             <span class="icon import">{% trans 'Import' %}</span>
         </button>
-        <a href="{% url user_overview%}">
-        <button class="button" type="button"  onclick="window.location='{% url user_overview %}'">
+        <a href="{% url 'user_overview' %}">
+        <button class="button" type="button"  onclick="window.location='{% url 'user_overview' %}'">
             <span class="icon cancel">{% trans 'Cancel' %}</span>
         </button>
         </a>
diff --git a/openslides/participant/templates/participant/login.html b/openslides/participant/templates/participant/login.html
index 1f182ade2..cd196cb14 100644
--- a/openslides/participant/templates/participant/login.html
+++ b/openslides/participant/templates/participant/login.html
@@ -5,7 +5,7 @@
 
 {% block mainmenu %}
     <ul>
-        <li class="selected"><a href="{% url user_login %}" title="">{% trans "Login" %}</a></li>
+        <li class="selected"><a href="{% url 'user_login' %}" title="">{% trans "Login" %}</a></li>
     </ul>
 {% endblock %}
 
@@ -41,7 +41,7 @@
             $(this).hide("fast");
         });
     </script>
-    <form method="post" action="{% url user_login %}{% if next %}?next={{ next }}{% endif %}">
+    <form method="post" action="{% url 'user_login' %}{% if next %}?next={{ next }}{% endif %}">
         {% csrf_token %}
         <table>
         <tr>
@@ -68,7 +68,7 @@
     {% if os_enable_anonymous_login %}
         <script>
             $("#anonymous_login").live('click', function () {
-                window.location.href = '{% url item_overview %}';
+                window.location.href = "{% url 'item_overview' %}";
                 return false;
             });
         </script>
diff --git a/openslides/participant/templates/participant/overview.html b/openslides/participant/templates/participant/overview.html
index 310cbf04c..829402e89 100644
--- a/openslides/participant/templates/participant/overview.html
+++ b/openslides/participant/templates/participant/overview.html
@@ -90,19 +90,19 @@
                     </td>
                     <td>
                         <span style="width: 1px; white-space: nowrap;">
-                            <a href="{% url user_edit user.id %}">
+                            <a href="{% url 'user_edit' user.id %}">
                                 <img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit participant' %}">
                             </a>
                             {% if user != request_user %}
-                            <a href="{% url user_delete user.id %}">
+                            <a href="{% url 'user_delete' user.id %}">
                                 <img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete participant' %}">
                             </a>
                             {% endif %}
                             {% if user != request_user and not user.is_superuser %}
-                            <a class="status_link deactivate" href="{% url user_status_deactivate user.id %}" title="{% trans 'Change status to inactive' %}"{% if not user.is_active %} style="display:none"{% endif %}>
+                            <a class="status_link deactivate" href="{% url 'user_status_deactivate' user.id %}" title="{% trans 'Change status to inactive' %}"{% if not user.is_active %} style="display:none"{% endif %}>
                                 <span></span>
                             </a>
-                            <a class="status_link activate" href="{% url user_status_activate user.id %}" title="{% trans 'Change status to active' %}"{% if user.is_active %} style="display:none"{% endif %}>
+                            <a class="status_link activate" href="{% url 'user_status_activate' user.id %}" title="{% trans 'Change status to active' %}"{% if user.is_active %} style="display:none"{% endif %}>
                                 <span></span>
                             </a>
                             {% endif %}
diff --git a/openslides/participant/templates/participant/password_change.html b/openslides/participant/templates/participant/password_change.html
index 491aa987a..a31b5bb9a 100644
--- a/openslides/participant/templates/participant/password_change.html
+++ b/openslides/participant/templates/participant/password_change.html
@@ -7,8 +7,8 @@
 {% block submenu %}
     <h4 class="sectiontitle">{% trans "User Settings" %}</h4>
     <ul>
-        <li><a href="{% url user_settings %}">{% trans "Personal Settings" %}</a></li>
-        <li class="selected"><a href="{% url password_change %}">{% trans "Password Settings" %}</a></li>
+        <li><a href="{% url 'user_settings' %}">{% trans "Personal Settings" %}</a></li>
+        <li class="selected"><a href="{% url 'password_change' %}">{% trans "Password Settings" %}</a></li>
     </ul>
 {% endblock %}
 
diff --git a/openslides/participant/templates/participant/settings.html b/openslides/participant/templates/participant/settings.html
index 8c59157eb..54bcf94e0 100644
--- a/openslides/participant/templates/participant/settings.html
+++ b/openslides/participant/templates/participant/settings.html
@@ -7,8 +7,8 @@
 {% block submenu %}
     <h4 class="sectiontitle">{% trans "User Settings" %}</h4>
     <ul>
-        <li class="selected"><a href="{% url user_settings %}">{% trans "Personal Settings" %}</a></li>
-        <li><a href="{% url password_change %}">{% trans "Password Settings" %}</a></li>
+        <li class="selected"><a href="{% url 'user_settings' %}">{% trans "Personal Settings" %}</a></li>
+        <li><a href="{% url 'password_change' %}">{% trans "Password Settings" %}</a></li>
     </ul>
 {% endblock %}
 
diff --git a/openslides/participant/templates/participant/user_widget.html b/openslides/participant/templates/participant/user_widget.html
index 00082aac7..ab762774e 100644
--- a/openslides/participant/templates/participant/user_widget.html
+++ b/openslides/participant/templates/participant/user_widget.html
@@ -4,7 +4,7 @@
 <ul style="line-height: 180%">
 {% for user in users %}
     <li class="{% if user.active %}activeline{% endif %}">
-        <a href="{% url projector_activate_slide user.sid %}" class="activate_link {% if user.active %}active{% endif %}">
+        <a href="{% url 'projector_activate_slide' user.sid %}" class="activate_link {% if user.active %}active{% endif %}">
             <div></div>
         </a>
         <a href="{% model_url user 'delete' %}" title="{% trans 'Delete' %}" class="icon delete right">
@@ -13,7 +13,7 @@
         <a href="{% model_url user 'edit' %}" title="{% trans 'Edit' %}" class="icon edit right">
             <span></span>
         </a>
-        <a href="{% url projctor_preview_slide user.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
+        <a href="{% url 'projctor_preview_slide' user.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
             <span></span>
         </a>
         <a href="{% model_url user 'view' %}">{{ user }}</a>
diff --git a/openslides/participant/views.py b/openslides/participant/views.py
index 34cb032a0..bae5f0a69 100644
--- a/openslides/participant/views.py
+++ b/openslides/participant/views.py
@@ -10,15 +10,8 @@
     :license: GNU GPL, see LICENSE for more details.
 """
 
-# for python 2.5 support
-from __future__ import with_statement
-
 from urllib import urlencode
-
-try:
-    from urlparse import parse_qs
-except ImportError:  # python <= 2.5 grab it from cgi
-    from cgi import parse_qs
+from urlparse import parse_qs
 
 from reportlab.lib import colors
 from reportlab.lib.units import cm
@@ -31,7 +24,7 @@ from django.contrib.auth.forms import PasswordChangeForm
 from django.contrib.auth.views import login as django_login
 from django.core.urlresolvers import reverse
 from django.shortcuts import redirect
-from django.utils.translation import ugettext as _, ugettext_lazy
+from django.utils.translation import ugettext as _, ugettext_lazy, activate
 
 from openslides.utils.pdf import stylesheet
 from openslides.utils.template import Tab
@@ -503,11 +496,15 @@ def user_settings(request):
         form_user = UsersettingsForm(request.POST, instance=request.user)
         if form_user.is_valid():
             form_user.save()
+            language = request.LANGUAGE_CODE = \
+                request.session['django_language'] = form_user.cleaned_data['language']
+            activate(language)
             messages.success(request, _('User settings successfully saved.'))
         else:
             messages.error(request, _('Please check the form for errors.'))
     else:
-        form_user = UsersettingsForm(instance=request.user)
+        language = request.session.get('django_language', request.LANGUAGE_CODE)
+        form_user = UsersettingsForm(instance=request.user, initial={'language': language})
 
     return {
         'form_user': form_user,
diff --git a/openslides/projector/templates/projector/base_projector.html b/openslides/projector/templates/projector/base_projector.html
index 2aae46a8d..93418c2cb 100644
--- a/openslides/projector/templates/projector/base_projector.html
+++ b/openslides/projector/templates/projector/base_projector.html
@@ -7,19 +7,19 @@
 {% block title %}{{ block.super}} – {% trans 'Dashboard' %} {% endblock %}
 
 {% block submenu %}
-    {% url dashboard as url_dashboard %}
-    {% url projector_select_widgets as url_select_widget %}
+    {% url 'dashboard' as url_dashboard %}
+    {% url 'projector_select_widgets' as url_select_widget %}
     <h4 class="sectiontitle">{% trans "Dashboard" %}</h4>
     <ul>
         <li{% if request.path == url_dashboard %} class="selected"{% endif %}>
-          <a href="{% url dashboard %}">{% trans 'Overview' %}</a>
+          <a href="{% url 'dashboard' %}">{% trans 'Overview' %}</a>
         </li>
         <li{% if request.path == url_select_widget %} class="selected"{% endif %}>
           <a href="{{ url_select_widget }}">{% trans 'Select widgets' %}</a>
         </li>
         {% if perms.projector.can_see_projector %}
             <li>
-                <a href="{% url projector_show %}"><img src="{% static 'images/icons/projector.png' %}"> {% trans 'Projector view' %}</a>
+                <a href="{% url 'projector_show' %}"><img src="{% static 'images/icons/projector.png' %}"> {% trans 'Projector view' %}</a>
             </li>
         {% endif %}
     </ul>
diff --git a/openslides/projector/templates/projector/control_countdown.html b/openslides/projector/templates/projector/control_countdown.html
index ec854d33d..1109596ad 100644
--- a/openslides/projector/templates/projector/control_countdown.html
+++ b/openslides/projector/templates/projector/control_countdown.html
@@ -4,16 +4,16 @@
 
 <span class="projector_countdown_spinbox">
     <input class="projector_countdown_spinval" id="countdown_time" name="countdown_time" type="number" min="0" value="{{ countdown_time }}"> {% trans "s" context "seconds" %}
-    <a id="countdown_set" class="countdown_control" href="{% url countdown_set_default %}" title="{% trans 'Save as default' %}">
-        <img src="{% static 'images/icons/document-save.png' %}" alt="{% url countdown_set_default %}">
+    <a id="countdown_set" class="countdown_control" href="{% url 'countdown_set_default' %}" title="{% trans 'Save as default' %}">
+        <img src="{% static 'images/icons/document-save.png' %}" alt="{% url 'countdown_set_default' %}">
     </a>
-    <a id="countdown_reset" class="countdown_control" href="{% url countdown_reset %}" title="{% trans 'Reset countdown' %}">
+    <a id="countdown_reset" class="countdown_control" href="{% url 'countdown_reset' %}" title="{% trans 'Reset countdown' %}">
         <img src="{% static 'images/icons/skip-backward.png' %}" alt="{% trans 'Reset countdown' %}">
     </a>
-    <a id="countdown_play" class="countdown_control" href="{% url countdown_start %}" title="{% trans 'Start countdown' %}"{% if countdown_state == 'active' %} style="display:none"{% endif %}>
-        <img src="{% static 'images/icons/play.png' %}" alt="{% url countdown_start %}">
+    <a id="countdown_play" class="countdown_control" href="{% url 'countdown_start' %}" title="{% trans 'Start countdown' %}"{% if countdown_state == 'active' %} style="display:none"{% endif %}>
+        <img src="{% static 'images/icons/play.png' %}" alt="{% url 'countdown_start' %}">
     </a>
-    <a id="countdown_stop" class="countdown_control" href="{% url countdown_stop %}" title="{% trans 'Stop countdown' %}"{% if countdown_state == 'inactive' or countdown_state == 'paused' or countdown_state == 'expired' %} style="display:none"{% endif %}>
-        <img src="{% static 'images/icons/pause.png' %}" alt="{% url countdown_stop %}">
+    <a id="countdown_stop" class="countdown_control" href="{% url 'countdown_stop' %}" title="{% trans 'Stop countdown' %}"{% if countdown_state == 'inactive' or countdown_state == 'paused' or countdown_state == 'expired' %} style="display:none"{% endif %}>
+        <img src="{% static 'images/icons/pause.png' %}" alt="{% url 'countdown_stop' %}">
     </a>
 </span>
diff --git a/openslides/projector/templates/projector/control_overlay_message.html b/openslides/projector/templates/projector/control_overlay_message.html
index 6741a3eff..2d7c631f7 100644
--- a/openslides/projector/templates/projector/control_overlay_message.html
+++ b/openslides/projector/templates/projector/control_overlay_message.html
@@ -2,7 +2,7 @@
 {% load i18n %}
 {% load tags %}
 
-<form id="overlay_message" action="{% url projector_overlay_message %}" method="post" style="display:inline">{% csrf_token %}
+<form id="overlay_message" action="{% url 'projector_overlay_message' %}" method="post" style="display:inline">{% csrf_token %}
     <input id="overlay_message_text" name='message_text' type='text' style='width: 40%' value="{% get_config 'projector_message' %}">
     <button type="submit" class="button" name='message'>
         <span class="icon ok">{% trans 'Apply' %}</span>
diff --git a/openslides/projector/templates/projector/custom_slide_widget.html b/openslides/projector/templates/projector/custom_slide_widget.html
index ec23da189..a188a42a8 100644
--- a/openslides/projector/templates/projector/custom_slide_widget.html
+++ b/openslides/projector/templates/projector/custom_slide_widget.html
@@ -5,10 +5,10 @@
 
 <ul style="line-height: 180%">
     <li class="{% if welcomepage_is_active %}activeline{% endif %}">
-        <a href="{% url projector_activate_welcomepage %}" class="activate_link {% if welcomepage_is_active %}active{% endif %}">
+        <a href="{% url 'projector_activate_welcomepage' %}" class="activate_link {% if welcomepage_is_active %}active{% endif %}">
             <div></div>
         </a>
-        <a href="{% url projctor_preview_welcomepage %}" title="{% trans 'Preview' %}" class="icon preview right">
+        <a href="{% url 'projctor_preview_welcomepage' %}" title="{% trans 'Preview' %}" class="icon preview right">
             <span></span>
         </a>
         {% trans 'Welcome Page' %}
@@ -18,26 +18,26 @@
 <ul style="line-height: 180%">
 {% for slide in slides %}
     <li class="{% if slide.active %}activeline{% endif %}">
-        <a href="{% url projector_activate_slide slide.sid %}" class="activate_link {% if slide.active %}active{% endif %}">
+        <a href="{% url 'projector_activate_slide' slide.sid %}" class="activate_link {% if slide.active %}active{% endif %}">
             <div></div>
         </a>
-        <a href="{% url customslide_delete slide.id %}" title="{% trans 'Delete' %}" class="icon delete right">
+        <a href="{% url 'customslide_delete' slide.id %}" title="{% trans 'Delete' %}" class="icon delete right">
             <span></span>
         </a>
-        <a href="{% url customslide_edit slide.id %}" title="{% trans 'Edit' %}" class="icon edit right">
+        <a href="{% url 'customslide_edit' slide.id %}" title="{% trans 'Edit' %}" class="icon edit right">
             <span></span>
         </a>
-        <a href="{% url projctor_preview_slide slide.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
+        <a href="{% url 'projctor_preview_slide' slide.sid %}" title="{% trans 'Preview' %}" class="icon preview right">
             <span></span>
         </a>
-        <a href="{% url customslide_edit slide.id %}">{{ slide }}</a>
+        <a href="{% url 'customslide_edit' slide.id %}">{{ slide }}</a>
     </li>
 {% empty %}
     <li>{% trans 'No items available.' %}</li>
 {% endfor %}
 </ul>
-<a href='{% url customslide_new %}'>
-    <button class="button" type="button" onclick="window.location='{% url customslide_new %}'">
+<a href='{% url "customslide_new" %}'>
+    <button class="button" type="button" onclick="window.location='{% url 'customslide_new' %}'">
         <span class="icon add">{% trans 'New slide' %}</span>
     </button>
 </a>
diff --git a/openslides/projector/templates/projector/live_view_widget.html b/openslides/projector/templates/projector/live_view_widget.html
index 0904868f1..2971e27f0 100644
--- a/openslides/projector/templates/projector/live_view_widget.html
+++ b/openslides/projector/templates/projector/live_view_widget.html
@@ -7,23 +7,23 @@
 {% if perms.projector.can_manage_projector %}
     <div style="float: right;">
         <p>
-        <a class="projector_edit" href="{% url projector_bigger %}" title="{% trans 'Zoom in' %}">
+        <a class="projector_edit" href="{% url 'projector_bigger' %}" title="{% trans 'Zoom in' %}">
             <img src="{% static 'images/icons/zoom-in.png' %}" />
         </a><br>
-        <a class="projector_edit" href="{% url projector_smaller %}" title="{% trans 'Zoom out' %}">
+        <a class="projector_edit" href="{% url 'projector_smaller' %}" title="{% trans 'Zoom out' %}">
             <img src="{% static 'images/icons/zoom-out.png' %}" />
         </a>
         </p>
         <p>
-        <a class="projector_edit" href="{% url projector_up %}" title="{% trans 'Scroll text up' %}">
+        <a class="projector_edit" href="{% url 'projector_up' %}" title="{% trans 'Scroll text up' %}">
             <img src="{% static 'images/icons/go-up.png' %}" />
         </a><br>
-        <a class="projector_edit" href="{% url projector_down %}" title="{% trans 'Scroll text down' %}">
+        <a class="projector_edit" href="{% url 'projector_down' %}" title="{% trans 'Scroll text down' %}">
             <img src="{% static 'images/icons/go-down.png' %}" />
         </a>
         </p>
         <p>
-        <a class="projector_edit" href="{% url projector_clean %}" title="{% trans 'Reset projector view' %}">
+        <a class="projector_edit" href="{% url 'projector_clean' %}" title="{% trans 'Reset projector view' %}">
             <img src="{% static 'images/icons/view-reset.png' %}" />
         </a>
         </p>
@@ -31,9 +31,9 @@
 {% endif %}
 
 <!-- projector view -->
-<a href="{% url projector_show %}" target="_blank">
+<a href="{% url 'projector_show' %}" target="_blank">
     <div id="iframewrapper">
-        <iframe id="iframe" src="{% url projector_show %}" frameborder="0"></iframe>
+        <iframe id="iframe" src="{% url 'projector_show' %}" frameborder="0"></iframe>
         <div id="iframeoverlay"></div>
     </div>
 </a>
diff --git a/openslides/projector/templates/projector/new.html b/openslides/projector/templates/projector/new.html
index c63e5e0ac..b01027434 100644
--- a/openslides/projector/templates/projector/new.html
+++ b/openslides/projector/templates/projector/new.html
@@ -15,8 +15,8 @@
         <button class="button" type="submit" name="apply">
             <span class="icon apply">{% trans 'Apply' %}</span>
         </button>
-        <a href='{% url dashboard %}'>
-        <button class="button" type="button" onclick="window.location='{% url dashboard %}'">
+        <a href='{% url "dashboard" %}'>
+        <button class="button" type="button" onclick="window.location='{% url 'dashboard' %}'">
             <span class="icon cancel">{% trans 'Cancel' %}</span>
         </button>
         </a>
diff --git a/openslides/projector/templates/projector/overlay_widget.html b/openslides/projector/templates/projector/overlay_widget.html
index 8b47a4539..7a98c67de 100644
--- a/openslides/projector/templates/projector/overlay_widget.html
+++ b/openslides/projector/templates/projector/overlay_widget.html
@@ -4,10 +4,10 @@
 <ul>
     {% for overlay in overlays %}
         <li>
-            <a id="{{ overlay.def_name }}_inactive" href="{% url projector_overlay_activate overlay.def_name %}" class="overlay"{% if overlay.active %} style="display:none"{% endif %}>
+            <a id="{{ overlay.def_name }}_inactive" href="{% url 'projector_overlay_activate' overlay.def_name %}" class="overlay"{% if overlay.active %} style="display:none"{% endif %}>
                 <div></div>
             </a>
-            <a id="{{ overlay.def_name }}_active" href="{% url projector_overlay_deactivate overlay.def_name %}" class="overlay active"{% if not overlay.active %} style="display:none"{% endif %}>
+            <a id="{{ overlay.def_name }}_active" href="{% url 'projector_overlay_deactivate' overlay.def_name %}" class="overlay active"{% if not overlay.active %} style="display:none"{% endif %}>
                 <div></div>
             </a>
 
diff --git a/openslides/templates/base.html b/openslides/templates/base.html
index e6af09a28..69d9ad2e5 100644
--- a/openslides/templates/base.html
+++ b/openslides/templates/base.html
@@ -12,7 +12,7 @@
     <link rel="shortcut icon" href="{% static 'images/favicon.png' %}" type="image/png" />
     <script type="text/javascript" src="{% static 'javascript/jquery.js' %}"></script>
     <script type="text/javascript" src="{% static 'javascript/utils.js' %}"></script>
-    <script type="text/javascript" src="{% url django.views.i18n.javascript_catalog %}"></script>
+    <script type="text/javascript" src="{% url 'django.views.i18n.javascript_catalog' %}"></script>
     {% block header %}
     {% endblock %}
 </head>
@@ -24,12 +24,12 @@
         <div id="header_userprofile">
             <ul>
             {% if user.is_authenticated %}
-                <li>|<a href="{% url user_logout %}">{% trans "Logout" %}</a></li>
-                {% url user_settings as url_usersettings %}
-                <li>|<a href="{% url user_settings %}">{% if request.path == url_usersettings %}<strong>{% endif %}{% trans "User Settings" %}{% if request.path == url_usersettings %}</strong>{% endif %}</a></li>
+                <li>|<a href="{% url 'user_logout' %}">{% trans "Logout" %}</a></li>
+                {% url 'user_settings' as url_usersettings %}
+                <li>|<a href="{% url 'user_settings' %}">{% if request.path == url_usersettings %}<strong>{% endif %}{% trans "User Settings" %}{% if request.path == url_usersettings %}</strong>{% endif %}</a></li>
                 <li>{% trans "Welcome" %}, <strong>{{ user.username }}</strong></li>
             {% else %}
-                <li><a href="{% url user_login %}">{% trans "Login" %}</a></li>
+                <li><a href="{% url 'user_login' %}">{% trans "Login" %}</a></li>
             {% endif %}
             </ul>
         </div>
diff --git a/openslides/utils/jsonfield/fields.py b/openslides/utils/jsonfield/fields.py
index 45c66aee4..9b1762214 100644
--- a/openslides/utils/jsonfield/fields.py
+++ b/openslides/utils/jsonfield/fields.py
@@ -1,8 +1,8 @@
+import json
+
 from django.db import models
 from django.core.serializers.json import DjangoJSONEncoder
-from django.utils import simplejson as json
 from django.utils.translation import ugettext_lazy as _
-
 from django.forms.fields import Field
 from django.forms.util import ValidationError as FormValidationError
 
diff --git a/openslides/utils/pdf.py b/openslides/utils/pdf.py
index 4064f109e..cf6db3c44 100755
--- a/openslides/utils/pdf.py
+++ b/openslides/utils/pdf.py
@@ -21,8 +21,7 @@ from reportlab.rl_config import defaultPageSize
 
 from django.conf import settings
 from django.utils import formats
-# Import gettext for python 2.5 support
-from django.utils.translation import ugettext as _, gettext
+from django.utils.translation import ugettext as _
 
 from openslides.config.models import config
 
diff --git a/openslides/utils/utils.py b/openslides/utils/utils.py
index fa5f96d5e..3225318fc 100644
--- a/openslides/utils/utils.py
+++ b/openslides/utils/utils.py
@@ -11,11 +11,7 @@
 """
 
 import sys
-
-try:
-    import json
-except ImportError:  # For python 2.5 support
-    import simplejson as json
+import json
 
 from django.contrib import messages
 from django.contrib.auth.models import Permission
diff --git a/openslides/utils/views.py b/openslides/utils/views.py
index b9d1fc4b9..fbc742bf4 100644
--- a/openslides/utils/views.py
+++ b/openslides/utils/views.py
@@ -10,11 +10,7 @@
     :license: GNU GPL, see LICENSE for more details.
 """
 
-try:
-    import json
-except ImportError:
-    # for python 2.5 support
-    import simplejson as json
+import json
 
 try:
     from cStringIO import StringIO
diff --git a/requirements.txt b/requirements.txt
index e43764974..8602f17e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,7 @@
-Django==1.4.2
-django-mptt
-reportlab
-PIL
-simplejson
-coverage
-django-discover-runner
-pep8
+Django==1.5b2
+django-mptt==0.5.5
+reportlab==2.6
+PIL==1.1.7
+coverage==3.6b1
+django-discover-runner==0.2.2
+pep8==1.3.3