diff --git a/client/package.json b/client/package.json
index 185c9e493..bf6f1d717 100644
--- a/client/package.json
+++ b/client/package.json
@@ -62,6 +62,7 @@
         "@angular/cli": "^7.3.2",
         "@angular/compiler-cli": "^7.2.5",
         "@angular/language-service": "^7.2.5",
+        "@biesbjerg/ngx-translate-extract": "^2.3.4",
         "@compodoc/compodoc": "^1.1.8",
         "@types/jasmine": "^3.3.9",
         "@types/jasminewd2": "^2.0.6",
diff --git a/client/src/app/core/marked-translations.ts b/client/src/app/core/marked-translations.ts
index 218a59128..38c826255 100644
--- a/client/src/app/core/marked-translations.ts
+++ b/client/src/app/core/marked-translations.ts
@@ -1,8 +1,9 @@
-// import { _ } from '@biesbjerg/ngx-translate-extract';
+import { _ } from '@biesbjerg/ngx-translate-extract';
 
-function _(key: string | string[]): string | string[] {
-    return key;
-}
+// see issue: 4078
+// function _(key: string | string[]): string | string[] {
+//     return key;
+// }
 
 /**
  * Add strings here that require translations but have never been declared
diff --git a/client/src/app/core/repositories/users/user-repository.service.ts b/client/src/app/core/repositories/users/user-repository.service.ts
index 1bff35684..6fac019eb 100644
--- a/client/src/app/core/repositories/users/user-repository.service.ts
+++ b/client/src/app/core/repositories/users/user-repository.service.ts
@@ -56,6 +56,10 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User> {
         viewUser.getVerboseName = (plural: boolean = false) => {
             return this.translate.instant(plural ? 'Participants' : 'Participant');
         };
+
+        viewUser.getNumberForName = (nr: number) => {
+            return `${this.translate.instant('No.')} ${nr}`;
+        };
         return viewUser;
     }
 
diff --git a/client/src/app/site/users/models/view-user.ts b/client/src/app/site/users/models/view-user.ts
index 7915cb6e4..f99a7d1ab 100644
--- a/client/src/app/site/users/models/view-user.ts
+++ b/client/src/app/site/users/models/view-user.ts
@@ -152,8 +152,7 @@ export class ViewUser extends BaseProjectableViewModel implements Searchable {
 
         const number = this.number ? this.number.trim() : '';
         if (number) {
-            // TODO Translate
-            additions.push('No. ' + number);
+            additions.push(this.getNumberForName(number));
         }
 
         if (additions.length > 0) {
@@ -167,6 +166,11 @@ export class ViewUser extends BaseProjectableViewModel implements Searchable {
      */
     public getVerboseName;
 
+    /**
+     * This is set by the repository. Translates the number string.
+     */
+    public getNumberForName;
+
     public constructor(user: User, groups?: ViewGroup[]) {
         super(User.COLLECTIONSTRING);
         this._user = user;