diff --git a/.gitignore b/.gitignore
index d2412c917..8d6c4a84a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,7 @@ coverage/
 .vscode/*
 !.vscode/launch.json
 !.vscode/settings.json
+!.vscode/tasks.json
 
 # FVM will create a relative symlink in your project from .fvm/versions/ to
 # the cache of the selected version. We should add this to our .gitignore.
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
new file mode 100644
index 000000000..af1896fee
--- /dev/null
+++ b/.vscode/tasks.json
@@ -0,0 +1,22 @@
+{
+    // See https://go.microsoft.com/fwlink/?LinkId=733558
+    // for the documentation about the tasks.json format
+    "version": "2.0.0",
+    "tasks": [
+        {
+            // This task generates the l10n files for the
+            // sharezone_localizations.
+            //
+            // FVM is required to run this task.
+            "label": "Generate l10n for sharezone_localizations",
+            "type": "shell",
+            // Additionally, we add the license header again (the "flutter
+            // gen-l10n" always removes the license header).
+            "command": "fvm flutter gen-l10n && addlicense -c \"Sharezone UG (haftungsbeschränkt)\" -f ../../header_template.txt .",
+            "options": {
+                "cwd": "${workspaceFolder}/lib/sharezone_localizations"
+            },
+            "problemMatcher": []
+        }
+    ]
+}
\ No newline at end of file
diff --git a/app/lib/activation_code/src/bloc/enter_activation_code_bloc.dart b/app/lib/activation_code/src/bloc/enter_activation_code_bloc.dart
index 9f08d173b..8294fbea0 100644
--- a/app/lib/activation_code/src/bloc/enter_activation_code_bloc.dart
+++ b/app/lib/activation_code/src/bloc/enter_activation_code_bloc.dart
@@ -15,6 +15,7 @@ import 'package:flutter/material.dart';
 import 'package:key_value_store/key_value_store.dart';
 import 'package:rxdart/rxdart.dart';
 import 'package:helper_functions/helper_functions.dart';
+import 'package:sharezone/l10n/feature_flag_l10n.dart';
 
 import '../models/enter_activation_code_result.dart';
 import 'enter_activation_code_activator.dart';
@@ -26,6 +27,7 @@ class EnterActivationCodeBloc extends BlocBase {
   final _enterActivationCodeSubject =
       BehaviorSubject<EnterActivationCodeResult>();
   final KeyValueStore keyValueStore;
+  final FeatureFlagl10n featureFlagl10n;
 
   String? _lastEnteredValue;
 
@@ -34,6 +36,7 @@ class EnterActivationCodeBloc extends BlocBase {
     this.crashAnalytics,
     this.appFunctions,
     this.keyValueStore,
+    this.featureFlagl10n,
   ) {
     _changeEnterActivationCodeResult(NoDataEnterActivationCodeResult());
   }
@@ -89,6 +92,11 @@ class EnterActivationCodeBloc extends BlocBase {
       return;
     }
 
+    if (_lastEnteredValue?.trim().toLowerCase() == 'l10n') {
+      _togglel10nFeatureFlag();
+      return;
+    }
+
     _changeEnterActivationCodeResult(LoadingEnterActivationCodeResult());
 
     final enterActivationCodeResult = await _runAppFunction(enteredValue);
@@ -107,6 +115,18 @@ class EnterActivationCodeBloc extends BlocBase {
     );
   }
 
+  void _togglel10nFeatureFlag() {
+    final currentValue = featureFlagl10n.isl10nEnabled;
+    featureFlagl10n.toggle();
+
+    _changeEnterActivationCodeResult(
+      SuccessfulEnterActivationCodeResult(
+        'l10n',
+        'l10n wurde ${!currentValue ? 'aktiviert' : 'deaktiviert'}. Starte die App neu, um die Änderungen zu sehen.',
+      ),
+    );
+  }
+
   Future<void> _clearCache(BuildContext context) async {
     await Future.wait([
       keyValueStore.clear(),
diff --git a/app/lib/activation_code/src/bloc/enter_activation_code_bloc_factory.dart b/app/lib/activation_code/src/bloc/enter_activation_code_bloc_factory.dart
index adf961012..5c752eab4 100644
--- a/app/lib/activation_code/src/bloc/enter_activation_code_bloc_factory.dart
+++ b/app/lib/activation_code/src/bloc/enter_activation_code_bloc_factory.dart
@@ -12,18 +12,21 @@ import 'package:bloc_base/bloc_base.dart';
 import 'package:crash_analytics/crash_analytics.dart';
 import 'package:key_value_store/key_value_store.dart';
 import 'package:sharezone/activation_code/src/bloc/enter_activation_code_bloc.dart';
+import 'package:sharezone/l10n/feature_flag_l10n.dart';
 
 class EnterActivationCodeBlocFactory extends BlocBase {
   final CrashAnalytics crashAnalytics;
   final Analytics analytics;
   final SharezoneAppFunctions appFunctions;
   final KeyValueStore keyValueStore;
+  final FeatureFlagl10n featureFlagl10n;
 
   EnterActivationCodeBlocFactory({
     required this.analytics,
     required this.crashAnalytics,
     required this.appFunctions,
     required this.keyValueStore,
+    required this.featureFlagl10n,
   });
 
   EnterActivationCodeBloc createBloc() {
@@ -32,6 +35,7 @@ class EnterActivationCodeBlocFactory extends BlocBase {
       crashAnalytics,
       appFunctions,
       keyValueStore,
+      featureFlagl10n,
     );
   }
 
diff --git a/app/lib/l10n/feature_flag_l10n.dart b/app/lib/l10n/feature_flag_l10n.dart
new file mode 100644
index 000000000..693a3fb26
--- /dev/null
+++ b/app/lib/l10n/feature_flag_l10n.dart
@@ -0,0 +1,42 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:sharezone/util/cache/streaming_key_value_store.dart';
+
+class FeatureFlagl10n extends ChangeNotifier {
+  FeatureFlagl10n(this.keyValueStore) {
+    _subscription = keyValueStore
+        .getBool('l10n_enabled', defaultValue: false)
+        .listen((event) {
+      final newValue = event == true;
+      if (isl10nEnabled != newValue) {
+        isl10nEnabled = newValue;
+        notifyListeners();
+      }
+    });
+  }
+
+  final StreamingKeyValueStore keyValueStore;
+  late StreamSubscription<bool> _subscription;
+  bool isl10nEnabled = false;
+
+  void toggle() {
+    isl10nEnabled = !isl10nEnabled;
+    keyValueStore.setBool('l10n_enabled', isl10nEnabled);
+    notifyListeners();
+  }
+
+  @override
+  void dispose() {
+    _subscription.cancel();
+    super.dispose();
+  }
+}
diff --git a/app/lib/l10n/flutter_app_local_gateway.dart b/app/lib/l10n/flutter_app_local_gateway.dart
new file mode 100644
index 000000000..b0aece534
--- /dev/null
+++ b/app/lib/l10n/flutter_app_local_gateway.dart
@@ -0,0 +1,42 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+import 'dart:convert';
+
+import 'package:sharezone/l10n/feature_flag_l10n.dart';
+import 'package:sharezone/util/cache/streaming_key_value_store.dart';
+import 'package:sharezone_localizations/sharezone_localizations.dart';
+
+class FlutterAppLocaleProviderGateway extends AppLocaleProviderGateway {
+  const FlutterAppLocaleProviderGateway({
+    required this.keyValueStore,
+    required this.featureFlagl10n,
+  });
+
+  final FeatureFlagl10n featureFlagl10n;
+  final StreamingKeyValueStore keyValueStore;
+
+  @override
+  Stream<AppLocale> getLocale() {
+    final defaultValue = jsonEncode(featureFlagl10n.isl10nEnabled
+        ? AppLocale.system.toMap()
+        : AppLocale.en.toMap());
+    return keyValueStore
+        .getString('locale', defaultValue: defaultValue)
+        .map((event) => AppLocale.fromMap(jsonDecode(event)));
+  }
+
+  @override
+  Future<void> setLocale(AppLocale locale) async {
+    final value = jsonEncode(locale.toMap());
+    keyValueStore.setString(
+      'locale',
+      value,
+    );
+  }
+}
diff --git a/app/lib/main/sharezone.dart b/app/lib/main/sharezone.dart
index 847eef8fd..e98ac182b 100644
--- a/app/lib/main/sharezone.dart
+++ b/app/lib/main/sharezone.dart
@@ -21,6 +21,8 @@ import 'package:provider/provider.dart';
 import 'package:sharezone/dynamic_links/beitrittsversuch.dart';
 import 'package:sharezone/dynamic_links/dynamic_link_bloc.dart';
 import 'package:sharezone/dynamic_links/dynamic_links.dart';
+import 'package:sharezone/l10n/feature_flag_l10n.dart';
+import 'package:sharezone/l10n/flutter_app_local_gateway.dart';
 import 'package:sharezone/main/auth_app.dart';
 import 'package:sharezone/main/bloc_dependencies.dart';
 import 'package:sharezone/main/sharezone_app.dart';
@@ -28,9 +30,11 @@ import 'package:sharezone/main/sharezone_bloc_providers.dart';
 import 'package:sharezone/navigation/logic/navigation_bloc.dart';
 import 'package:sharezone/notifications/notifications_permission.dart';
 import 'package:sharezone/onboarding/group_onboarding/logic/signed_up_bloc.dart';
+import 'package:sharezone/util/cache/streaming_key_value_store.dart';
 import 'package:sharezone/util/flavor.dart';
 import 'package:sharezone/widgets/animation/color_fade_in.dart';
 import 'package:sharezone/widgets/development_stage_banner.dart';
+import 'package:sharezone_localizations/sharezone_localizations.dart';
 import 'package:sharezone_utils/device_information_manager.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
@@ -72,6 +76,8 @@ class Sharezone extends StatefulWidget {
 class _SharezoneState extends State<Sharezone> with WidgetsBindingObserver {
   late SignUpBloc signUpBloc;
   late StreamSubscription<AuthUser?> authSubscription;
+  late StreamingKeyValueStore streamingKeyValueStore;
+  late FeatureFlagl10n featureFlagl10n;
 
   @override
   void initState() {
@@ -93,6 +99,11 @@ class _SharezoneState extends State<Sharezone> with WidgetsBindingObserver {
     authSubscription = listenToAuthStateChanged().listen((user) {
       authUserSubject.sink.add(user);
     });
+
+    streamingKeyValueStore = FlutterStreamingKeyValueStore(
+      widget.blocDependencies.streamingSharedPreferences,
+    );
+    featureFlagl10n = FeatureFlagl10n(streamingKeyValueStore);
   }
 
   void logAppOpen() {
@@ -129,6 +140,15 @@ class _SharezoneState extends State<Sharezone> with WidgetsBindingObserver {
                                 MobileDeviceInformationRetriever(),
                           ),
                         ),
+                        ChangeNotifierProvider.value(value: featureFlagl10n),
+                        ChangeNotifierProvider(
+                          create: (context) => AppLocaleProvider(
+                            gateway: FlutterAppLocaleProviderGateway(
+                              keyValueStore: streamingKeyValueStore,
+                              featureFlagl10n: featureFlagl10n,
+                            ),
+                          ),
+                        ),
                       ],
                       child: MultiBlocProvider(
                         blocProviders: [
diff --git a/app/lib/main/sharezone_app.dart b/app/lib/main/sharezone_app.dart
index f8a5bf691..44414f477 100644
--- a/app/lib/main/sharezone_app.dart
+++ b/app/lib/main/sharezone_app.dart
@@ -46,6 +46,7 @@ import 'package:sharezone/settings/settings_page.dart';
 import 'package:sharezone/settings/src/subpages/about/about_page.dart';
 import 'package:sharezone/settings/src/subpages/changelog_page.dart';
 import 'package:sharezone/settings/src/subpages/imprint/page/imprint_page.dart';
+import 'package:sharezone/settings/src/subpages/language/language_page.dart';
 import 'package:sharezone/settings/src/subpages/my_profile/change_email.dart';
 import 'package:sharezone/settings/src/subpages/my_profile/change_password.dart';
 import 'package:sharezone/settings/src/subpages/my_profile/change_state.dart';
@@ -204,6 +205,7 @@ class _SharezoneAppState extends State<SharezoneApp>
                 ICalLinksDialog.tag: (context) => const ICalLinksDialog(),
                 CreateTermPage.tag: (context) => const CreateTermPage(),
                 GradesDialog.tag: (context) => const GradesDialog(),
+                LanguagePage.tag: (context) => const LanguagePage(),
               },
               navigatorKey: navigationService.navigatorKey,
             ),
diff --git a/app/lib/main/sharezone_bloc_providers.dart b/app/lib/main/sharezone_bloc_providers.dart
index b2110bf01..122fc9224 100644
--- a/app/lib/main/sharezone_bloc_providers.dart
+++ b/app/lib/main/sharezone_bloc_providers.dart
@@ -84,6 +84,7 @@ import 'package:sharezone/ical_links/dialog/ical_links_dialog_controller_factory
 import 'package:sharezone/ical_links/list/ical_links_page_controller.dart';
 import 'package:sharezone/ical_links/shared/ical_link_analytics.dart';
 import 'package:sharezone/ical_links/shared/ical_links_gateway.dart';
+import 'package:sharezone/l10n/feature_flag_l10n.dart';
 import 'package:sharezone/main/application_bloc.dart';
 import 'package:sharezone/main/bloc_dependencies.dart';
 import 'package:sharezone/main/onboarding/onboarding_navigator.dart';
@@ -497,7 +498,7 @@ class _SharezoneBlocProvidersState extends State<SharezoneBlocProviders> {
         ),
         lazy: false,
       ),
-      Provider<KeyValueStore>.value(value: keyValueStore)
+      Provider<KeyValueStore>.value(value: keyValueStore),
     ];
 
     mainBlocProviders = <BlocProvider>[
@@ -593,6 +594,7 @@ class _SharezoneBlocProvidersState extends State<SharezoneBlocProviders> {
           analytics: analytics,
           appFunctions: api.references.functions,
           keyValueStore: widget.blocDependencies.keyValueStore,
+          featureFlagl10n: context.read<FeatureFlagl10n>(),
         ),
       ),
       BlocProvider<NotificationsBlocFactory>(
diff --git a/app/lib/main/sharezone_material_app.dart b/app/lib/main/sharezone_material_app.dart
index f1d1054dc..f9e4e9a93 100644
--- a/app/lib/main/sharezone_material_app.dart
+++ b/app/lib/main/sharezone_material_app.dart
@@ -9,10 +9,10 @@
 import 'package:analytics/analytics.dart';
 import 'package:analytics/observer.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:platform_check/platform_check.dart';
 import 'package:provider/provider.dart';
 import 'package:sharezone/main/bloc_dependencies.dart';
+import 'package:sharezone_localizations/sharezone_localizations.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 class SharezoneMaterialApp extends StatelessWidget {
@@ -35,7 +35,7 @@ class SharezoneMaterialApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final themeSettings = context.watch<ThemeSettings>();
-
+    final localProvider = context.watch<AppLocaleProvider>();
     return MaterialApp(
       debugShowCheckedModeBanner: false,
       title: PlatformCheck.isWeb ? "Sharezone Web-App" : "Sharezone",
@@ -45,15 +45,9 @@ class SharezoneMaterialApp extends StatelessWidget {
       theme: getLightTheme().copyWith(
           visualDensity: themeSettings.visualDensitySetting.visualDensity),
       themeMode: _getThemeMode(themeSettings.themeBrightness),
-      localizationsDelegates: const [
-        GlobalMaterialLocalizations.delegate,
-        GlobalWidgetsLocalizations.delegate,
-        GlobalCupertinoLocalizations.delegate,
-      ],
-      supportedLocales: const [
-        Locale('en', 'US'),
-        Locale('de', 'DE'),
-      ],
+      localizationsDelegates: SharezoneLocalizations.localizationsDelegates,
+      supportedLocales: SharezoneLocalizations.supportedLocales,
+      locale: localProvider.locale.toLocale(),
       navigatorObservers: <NavigatorObserver>[
         AnalyticsNavigationObserver(analytics: analytics)
       ],
diff --git a/app/lib/settings/settings_page.dart b/app/lib/settings/settings_page.dart
index 393cfcf19..d7a28a121 100644
--- a/app/lib/settings/settings_page.dart
+++ b/app/lib/settings/settings_page.dart
@@ -10,12 +10,15 @@ import 'package:analytics/analytics.dart';
 import 'package:bloc_provider/bloc_provider.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_svg/svg.dart';
+import 'package:provider/provider.dart';
+import 'package:sharezone/l10n/feature_flag_l10n.dart';
 import 'package:sharezone/legal/terms_of_service/terms_of_service_page.dart';
 import 'package:sharezone/main/application_bloc.dart';
 import 'package:sharezone/navigation/logic/navigation_bloc.dart';
 import 'package:sharezone/navigation/models/navigation_item.dart';
 import 'package:sharezone/navigation/scaffold/sharezone_main_scaffold.dart';
 import 'package:sharezone/settings/src/subpages/changelog_page.dart';
+import 'package:sharezone/settings/src/subpages/language/language_page.dart';
 import 'package:sharezone/settings/src/subpages/notification.dart';
 import 'package:sharezone/settings/src/subpages/about/about_page.dart';
 import 'package:sharezone/settings/src/subpages/theme/theme_page.dart';
@@ -145,29 +148,36 @@ class _LegalSection extends StatelessWidget {
 class _AppSettingsSection extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return const _SettingsSection(
+    final featureFlagl10n = context.watch<FeatureFlagl10n>();
+    return _SettingsSection(
       title: 'App-Einstellungen',
       children: <Widget>[
-        _SettingsOption(
+        const _SettingsOption(
           title: "Mein Konto",
           icon: Icon(Icons.account_circle),
           tag: MyProfilePage.tag,
         ),
-        _SettingsOption(
+        const _SettingsOption(
           title: "Benachrichtigungen",
           icon: Icon(Icons.notifications_active),
           tag: NotificationPage.tag,
         ),
-        _SettingsOption(
+        const _SettingsOption(
           title: "Erscheinungsbild",
           icon: Icon(Icons.color_lens),
           tag: ThemePage.tag,
         ),
-        _SettingsOption(
+        const _SettingsOption(
           title: "Stundenplan",
           icon: Icon(Icons.access_time),
           tag: TimetableSettingsPage.tag,
-        )
+        ),
+        if (featureFlagl10n.isl10nEnabled)
+          const _SettingsOption(
+            title: "Sprache",
+            icon: Icon(Icons.language),
+            tag: LanguagePage.tag,
+          ),
       ],
     );
   }
diff --git a/app/lib/settings/src/subpages/language/language_page.dart b/app/lib/settings/src/subpages/language/language_page.dart
new file mode 100644
index 000000000..080728f4a
--- /dev/null
+++ b/app/lib/settings/src/subpages/language/language_page.dart
@@ -0,0 +1,56 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:sharezone_localizations/sharezone_localizations.dart';
+import 'package:sharezone_widgets/sharezone_widgets.dart';
+
+class LanguagePage extends StatelessWidget {
+  const LanguagePage({super.key});
+
+  static const tag = 'language';
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: Text(context.l10n.languagePageTitle)),
+      body: ListView(
+        padding: const EdgeInsets.all(12),
+        children:
+            AppLocale.values.map((locale) => _LanguageTile(locale)).toList(),
+      ),
+    );
+  }
+}
+
+class _LanguageTile extends StatelessWidget {
+  const _LanguageTile(this.locale);
+
+  final AppLocale locale;
+
+  @override
+  Widget build(BuildContext context) {
+    final localeProvider = context.watch<AppLocaleProvider>();
+    return MaxWidthConstraintBox(
+      child: SafeArea(
+        child: RadioListTile<AppLocale>(
+          title: Text(locale.getNativeName(context)),
+          subtitle: locale.isSystem()
+              ? null
+              : Text(locale.getTranslatedName(context)),
+          value: locale,
+          groupValue: localeProvider.locale,
+          onChanged: (value) {
+            localeProvider.locale = value!;
+          },
+        ),
+      ),
+    );
+  }
+}
diff --git a/app/pubspec.lock b/app/pubspec.lock
index 2f8520b9e..1b73e07d8 100644
--- a/app/pubspec.lock
+++ b/app/pubspec.lock
@@ -1995,6 +1995,13 @@ packages:
       relative: true
     source: path
     version: "1.0.0"
+  sharezone_localizations:
+    dependency: "direct main"
+    description:
+      path: "../lib/sharezone_localizations"
+      relative: true
+    source: path
+    version: "1.0.0"
   sharezone_plus_page_ui:
     dependency: "direct main"
     description:
diff --git a/app/pubspec.yaml b/app/pubspec.yaml
index ea4f78973..7aafd648d 100644
--- a/app/pubspec.yaml
+++ b/app/pubspec.yaml
@@ -162,6 +162,8 @@ dependencies:
   shared_preferences: ^2.2.3
   sharezone_common:
     path: ../lib/sharezone_common
+  sharezone_localizations:
+    path: ../lib/sharezone_localizations
   sharezone_utils:
     path: ../lib/sharezone_utils
   sharezone_plus_page_ui:
diff --git a/app/test_goldens/settings/settings_page_test.dart b/app/test_goldens/settings/settings_page_test.dart
index ca5d71b68..a36a10855 100644
--- a/app/test_goldens/settings/settings_page_test.dart
+++ b/app/test_goldens/settings/settings_page_test.dart
@@ -11,20 +11,28 @@ import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:golden_toolkit/golden_toolkit.dart';
 import 'package:mockito/annotations.dart';
+import 'package:provider/provider.dart';
+import 'package:sharezone/l10n/feature_flag_l10n.dart';
 import 'package:sharezone/main/application_bloc.dart';
 import 'package:sharezone/settings/settings_page.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 import 'settings_page_test.mocks.dart';
 
-@GenerateNiceMocks([MockSpec<SharezoneContext>()])
+@GenerateNiceMocks([
+  MockSpec<SharezoneContext>(),
+  MockSpec<FeatureFlagl10n>(),
+])
 void main() {
   group(SettingsPageBody, () {
     Future<void> pushSettingsPage(WidgetTester tester, ThemeData theme) async {
       await tester.pumpWidgetBuilder(
         BlocProvider<SharezoneContext>(
           bloc: MockSharezoneContext(),
-          child: const SettingsPageBody(),
+          child: ChangeNotifierProvider<FeatureFlagl10n>(
+            create: (context) => MockFeatureFlagl10n(),
+            child: const SettingsPageBody(),
+          ),
         ),
         wrapper: materialAppWrapper(theme: theme),
       );
diff --git a/app/test_goldens/settings/settings_page_test.mocks.dart b/app/test_goldens/settings/settings_page_test.mocks.dart
index 35fb5e1e0..0eff026c7 100644
--- a/app/test_goldens/settings/settings_page_test.mocks.dart
+++ b/app/test_goldens/settings/settings_page_test.mocks.dart
@@ -3,11 +3,15 @@
 // Do not manually edit this file.
 
 // ignore_for_file: no_leading_underscores_for_library_prefixes
+import 'dart:ui' as _i10;
+
 import 'package:analytics/analytics.dart' as _i3;
 import 'package:mockito/mockito.dart' as _i1;
 import 'package:shared_preferences/shared_preferences.dart' as _i5;
-import 'package:sharezone/main/application_bloc.dart' as _i7;
+import 'package:sharezone/l10n/feature_flag_l10n.dart' as _i9;
+import 'package:sharezone/main/application_bloc.dart' as _i8;
 import 'package:sharezone/util/api.dart' as _i2;
+import 'package:sharezone/util/cache/streaming_key_value_store.dart' as _i7;
 import 'package:sharezone/util/navigation_service.dart' as _i6;
 import 'package:streaming_shared_preferences/streaming_shared_preferences.dart'
     as _i4;
@@ -79,10 +83,21 @@ class _FakeNavigationService_4 extends _i1.SmartFake
         );
 }
 
+class _FakeStreamingKeyValueStore_5 extends _i1.SmartFake
+    implements _i7.StreamingKeyValueStore {
+  _FakeStreamingKeyValueStore_5(
+    Object parent,
+    Invocation parentInvocation,
+  ) : super(
+          parent,
+          parentInvocation,
+        );
+}
+
 /// A class which mocks [SharezoneContext].
 ///
 /// See the documentation for Mockito's code generation for more information.
-class MockSharezoneContext extends _i1.Mock implements _i7.SharezoneContext {
+class MockSharezoneContext extends _i1.Mock implements _i8.SharezoneContext {
   @override
   _i2.SharezoneGateway get api => (super.noSuchMethod(
         Invocation.getter(#api),
@@ -158,3 +173,89 @@ class MockSharezoneContext extends _i1.Mock implements _i7.SharezoneContext {
         returnValueForMissingStub: null,
       );
 }
+
+/// A class which mocks [FeatureFlagl10n].
+///
+/// See the documentation for Mockito's code generation for more information.
+class MockFeatureFlagl10n extends _i1.Mock implements _i9.FeatureFlagl10n {
+  @override
+  _i7.StreamingKeyValueStore get keyValueStore => (super.noSuchMethod(
+        Invocation.getter(#keyValueStore),
+        returnValue: _FakeStreamingKeyValueStore_5(
+          this,
+          Invocation.getter(#keyValueStore),
+        ),
+        returnValueForMissingStub: _FakeStreamingKeyValueStore_5(
+          this,
+          Invocation.getter(#keyValueStore),
+        ),
+      ) as _i7.StreamingKeyValueStore);
+
+  @override
+  bool get isl10nEnabled => (super.noSuchMethod(
+        Invocation.getter(#isl10nEnabled),
+        returnValue: false,
+        returnValueForMissingStub: false,
+      ) as bool);
+
+  @override
+  set isl10nEnabled(bool? _isl10nEnabled) => super.noSuchMethod(
+        Invocation.setter(
+          #isl10nEnabled,
+          _isl10nEnabled,
+        ),
+        returnValueForMissingStub: null,
+      );
+
+  @override
+  bool get hasListeners => (super.noSuchMethod(
+        Invocation.getter(#hasListeners),
+        returnValue: false,
+        returnValueForMissingStub: false,
+      ) as bool);
+
+  @override
+  void toggle() => super.noSuchMethod(
+        Invocation.method(
+          #toggle,
+          [],
+        ),
+        returnValueForMissingStub: null,
+      );
+
+  @override
+  void dispose() => super.noSuchMethod(
+        Invocation.method(
+          #dispose,
+          [],
+        ),
+        returnValueForMissingStub: null,
+      );
+
+  @override
+  void addListener(_i10.VoidCallback? listener) => super.noSuchMethod(
+        Invocation.method(
+          #addListener,
+          [listener],
+        ),
+        returnValueForMissingStub: null,
+      );
+
+  @override
+  void removeListener(_i10.VoidCallback? listener) => super.noSuchMethod(
+        Invocation.method(
+          #removeListener,
+          [listener],
+        ),
+        returnValueForMissingStub: null,
+      );
+
+  @override
+  void notifyListeners() => super.noSuchMethod(
+        Invocation.method(
+          #notifyListeners,
+          [],
+        ),
+        returnValueForMissingStub: null,
+      );
+}
diff --git a/lib/sharezone_localizations/README.md b/lib/sharezone_localizations/README.md
new file mode 100644
index 000000000..8dea342d2
--- /dev/null
+++ b/lib/sharezone_localizations/README.md
@@ -0,0 +1,122 @@
+# sharezone_localizations
+
+**Sharezone Localizations** generates easily accessible translatable strings for the Sharezone-App. This package leverages Flutter's [Internationalization (i18n)](https://docs.flutter.dev/development/accessibility-and-localization/internationalization) features, providing an easy interface for adding, generating, and accessing localized strings in your application.
+
+Additionally:
+
+- AppLocaleProviderBloc: Allows you to manage and switch the current locale at runtime.
+- AppLocaleBuilder: Enables direct access to the current AppLocales enum value in your UI, making it straightforward to conditionally render widgets or styles based on the current locale.
+
+## Table of Contents
+
+- [sharezone\_localizations](#sharezone_localizations)
+  - [Table of Contents](#table-of-contents)
+  - [Features](#features)
+  - [Usage](#usage)
+    - [Accessing Localized Strings](#accessing-localized-strings)
+    - [How to Add/Update Strings](#how-to-addupdate-strings)
+  - [Generating Localizations](#generating-localizations)
+    - [Flutter Gen-L10n Command](#flutter-gen-l10n-command)
+    - [Using VS Code Task](#using-vs-code-task)
+
+---
+
+## Features
+
+- Easy String Access: Access your translations using a simple extension (context.l10n).
+- Multiple Locales: Support multiple languages via .arb files.
+- Automatic Code Generation: Easily generate localization delegates and associated code using the flutter gen-l10n tool (or a dedicated VS Code Task).
+- Locale Management:
+  - `AppLocaleProvider` helps you access and manage the current locale in real time, allowing dynamic locale switching.
+
+---
+
+## Usage
+
+### Accessing Localized Strings
+
+After you have generated your localizations (see [Generating Localizations](#generating-localizations)), you can access the strings via the BuildContext extension:
+
+```dart
+import 'package:flutter/material.dart';
+import 'package:sharezone_localizations/sharezone_localizations.dart';
+
+class MyHomePage extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(context.l10n.common_actions_cancel),
+      ),
+      body: Center(
+        child: Text(context.l10n.common_actions_cancel),
+      ),
+    );
+  }
+}
+```
+
+Where `common_actions_cancel` is the key from your .arb file (e.g., `app_en.arb`).  
+Use it as `context.l10n.common_actions_cancel`.
+
+To manage or observe locale changes:
+
+- `AppLocaleProvider` can be injected in your widget tree to handle locale switching logic.
+
+---
+
+### How to Add/Update Strings
+
+1. Open your `.arb` file for the corresponding locale (e.g., `l10n/app_en.arb` for English).
+2. Add a new key-value pair. For example:
+   ```json
+   {
+     "common_actions_cancel": "Cancel"
+   }
+   ```
+3. (Optional) Add placeholders if needed:
+   ```json
+   {
+     "welcome_message": "Hello, {userName}!",
+     "@welcome_message": {
+       "description": "A welcome message for the user",
+       "placeholders": {
+         "userName": {}
+       }
+     }
+   }
+   ```
+
+This allows you to dynamically inject parameters (for example userName) into the string.
+
+4. Repeat the above steps in each relevant .arb file (e.g., app_de.arb, app_es.arb, etc.) to keep translations up to date across your app. (Optionally you can use packages like arb_translate for auto translations)
+5. We use `"@_COMMENT:" {}` as comments in the .arb files. This is a workaround because the .arb format does not support comments:
+    ```json
+    {
+      "@_HOMEWORK": {},
+      "homework_page_title": "Homework",
+      "..."
+    }
+    ```
+
+## Generating Localizations
+
+After updating or creating .arb files, regenerate the localizations so Flutter can reflect the changes.
+
+### Flutter Gen-L10n Command
+
+Run inside this package:
+
+```bash
+flutter gen-l10n
+```
+
+### Using VS Code Task
+
+If you have a VS Code task called "Generate l10n for sharezone_localizations", you can:
+
+1. Open the Command Palette (⇧⌘P on macOS / Ctrl+Shift+P on Windows).
+2. Select "Tasks: Run Task".
+3. Choose "Generate l10n for sharezone_localizations".
+
+This task runs `flutter gen-l10n` with your chosen configuration.
diff --git a/lib/sharezone_localizations/analysis_options.yaml b/lib/sharezone_localizations/analysis_options.yaml
new file mode 100644
index 000000000..1e445c14e
--- /dev/null
+++ b/lib/sharezone_localizations/analysis_options.yaml
@@ -0,0 +1,9 @@
+# Copyright (c) 2023 Sharezone UG (haftungsbeschränkt)
+# Licensed under the EUPL-1.2-or-later.
+#
+# You may obtain a copy of the Licence at:
+# https://joinup.ec.europa.eu/software/page/eupl
+#
+# SPDX-License-Identifier: EUPL-1.2
+
+include: package:sharezone_lints/analysis_options.yaml
diff --git a/lib/sharezone_localizations/l10n.yaml b/lib/sharezone_localizations/l10n.yaml
new file mode 100644
index 000000000..fbf1cd89c
--- /dev/null
+++ b/lib/sharezone_localizations/l10n.yaml
@@ -0,0 +1,15 @@
+# Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+# Licensed under the EUPL-1.2-or-later.
+#
+# You may obtain a copy of the Licence at:
+# https://joinup.ec.europa.eu/software/page/eupl
+#
+# SPDX-License-Identifier: EUPL-1.2
+
+arb-dir: l10n
+template-arb-file: app_de.arb
+output-dir: lib/localizations
+output-localization-file: sharezone_localizations.gen.dart
+output-class: SharezoneLocalizations
+synthetic-package: false
+format: true
\ No newline at end of file
diff --git a/lib/sharezone_localizations/l10n/app_de.arb b/lib/sharezone_localizations/l10n/app_de.arb
new file mode 100644
index 000000000..e6a16d797
--- /dev/null
+++ b/lib/sharezone_localizations/l10n/app_de.arb
@@ -0,0 +1,13 @@
+{
+    "@@locale": "de",
+    "@_APP": {},
+    "appName": "Sharezone",
+    "@_COMMON": {},
+    "commonActionsCancel": "Abbrechen",
+    "commonActionsConfirm": "Bestätigen",
+    "@_LANGUAGES": {},
+    "languagePageTitle": "Sprache",
+    "languageSystemName": "System",
+    "languageDeName": "Deutsch",
+    "languageEnName": "Englisch"
+}
\ No newline at end of file
diff --git a/lib/sharezone_localizations/l10n/app_en.arb b/lib/sharezone_localizations/l10n/app_en.arb
new file mode 100644
index 000000000..bcaaf10bc
--- /dev/null
+++ b/lib/sharezone_localizations/l10n/app_en.arb
@@ -0,0 +1,13 @@
+{
+    "@@locale": "en",
+    "@_APP": {},
+    "appName": "Sharezone",
+    "@_COMMON": {},
+    "commonActionsCancel": "Cancel",
+    "commonActionsConfirm": "Confirm",
+    "@_LANGUAGES": {},
+    "languagePageTitle": "Language",
+    "languageSystemName": "System",
+    "languageDeName": "German",
+    "languageEnName": "English"
+}
\ No newline at end of file
diff --git a/lib/sharezone_localizations/lib/localizations/sharezone_localizations.gen.dart b/lib/sharezone_localizations/lib/localizations/sharezone_localizations.gen.dart
new file mode 100644
index 000000000..be156cc1d
--- /dev/null
+++ b/lib/sharezone_localizations/lib/localizations/sharezone_localizations.gen.dart
@@ -0,0 +1,185 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/widgets.dart';
+import 'package:flutter_localizations/flutter_localizations.dart';
+import 'package:intl/intl.dart' as intl;
+
+import 'sharezone_localizations_de.gen.dart';
+import 'sharezone_localizations_en.gen.dart';
+
+// ignore_for_file: type=lint
+
+/// Callers can lookup localized strings with an instance of SharezoneLocalizations
+/// returned by `SharezoneLocalizations.of(context)`.
+///
+/// Applications need to include `SharezoneLocalizations.delegate()` in their app's
+/// `localizationDelegates` list, and the locales they support in the app's
+/// `supportedLocales` list. For example:
+///
+/// ```dart
+/// import 'localizations/sharezone_localizations.gen.dart';
+///
+/// return MaterialApp(
+///   localizationsDelegates: SharezoneLocalizations.localizationsDelegates,
+///   supportedLocales: SharezoneLocalizations.supportedLocales,
+///   home: MyApplicationHome(),
+/// );
+/// ```
+///
+/// ## Update pubspec.yaml
+///
+/// Please make sure to update your pubspec.yaml to include the following
+/// packages:
+///
+/// ```yaml
+/// dependencies:
+///   # Internationalization support.
+///   flutter_localizations:
+///     sdk: flutter
+///   intl: any # Use the pinned version from flutter_localizations
+///
+///   # Rest of dependencies
+/// ```
+///
+/// ## iOS Applications
+///
+/// iOS applications define key application metadata, including supported
+/// locales, in an Info.plist file that is built into the application bundle.
+/// To configure the locales supported by your app, you’ll need to edit this
+/// file.
+///
+/// First, open your project’s ios/Runner.xcworkspace Xcode workspace file.
+/// Then, in the Project Navigator, open the Info.plist file under the Runner
+/// project’s Runner folder.
+///
+/// Next, select the Information Property List item, select Add Item from the
+/// Editor menu, then select Localizations from the pop-up menu.
+///
+/// Select and expand the newly-created Localizations item then, for each
+/// locale your application supports, add a new item and select the locale
+/// you wish to add from the pop-up menu in the Value field. This list should
+/// be consistent with the languages listed in the SharezoneLocalizations.supportedLocales
+/// property.
+abstract class SharezoneLocalizations {
+  SharezoneLocalizations(String locale)
+      : localeName = intl.Intl.canonicalizedLocale(locale.toString());
+
+  final String localeName;
+
+  static SharezoneLocalizations? of(BuildContext context) {
+    return Localizations.of<SharezoneLocalizations>(
+        context, SharezoneLocalizations);
+  }
+
+  static const LocalizationsDelegate<SharezoneLocalizations> delegate =
+      _SharezoneLocalizationsDelegate();
+
+  /// A list of this localizations delegate along with the default localizations
+  /// delegates.
+  ///
+  /// Returns a list of localizations delegates containing this delegate along with
+  /// GlobalMaterialLocalizations.delegate, GlobalCupertinoLocalizations.delegate,
+  /// and GlobalWidgetsLocalizations.delegate.
+  ///
+  /// Additional delegates can be added by appending to this list in
+  /// MaterialApp. This list does not have to be used at all if a custom list
+  /// of delegates is preferred or required.
+  static const List<LocalizationsDelegate<dynamic>> localizationsDelegates =
+      <LocalizationsDelegate<dynamic>>[
+    delegate,
+    GlobalMaterialLocalizations.delegate,
+    GlobalCupertinoLocalizations.delegate,
+    GlobalWidgetsLocalizations.delegate,
+  ];
+
+  /// A list of this localizations delegate's supported locales.
+  static const List<Locale> supportedLocales = <Locale>[
+    Locale('de'),
+    Locale('en')
+  ];
+
+  /// No description provided for @appName.
+  ///
+  /// In de, this message translates to:
+  /// **'Sharezone'**
+  String get appName;
+
+  /// No description provided for @commonActionsCancel.
+  ///
+  /// In de, this message translates to:
+  /// **'Abbrechen'**
+  String get commonActionsCancel;
+
+  /// No description provided for @commonActionsConfirm.
+  ///
+  /// In de, this message translates to:
+  /// **'Bestätigen'**
+  String get commonActionsConfirm;
+
+  /// No description provided for @languagePageTitle.
+  ///
+  /// In de, this message translates to:
+  /// **'Sprache'**
+  String get languagePageTitle;
+
+  /// No description provided for @languageSystemName.
+  ///
+  /// In de, this message translates to:
+  /// **'System'**
+  String get languageSystemName;
+
+  /// No description provided for @languageDeName.
+  ///
+  /// In de, this message translates to:
+  /// **'Deutsch'**
+  String get languageDeName;
+
+  /// No description provided for @languageEnName.
+  ///
+  /// In de, this message translates to:
+  /// **'Englisch'**
+  String get languageEnName;
+}
+
+class _SharezoneLocalizationsDelegate
+    extends LocalizationsDelegate<SharezoneLocalizations> {
+  const _SharezoneLocalizationsDelegate();
+
+  @override
+  Future<SharezoneLocalizations> load(Locale locale) {
+    return SynchronousFuture<SharezoneLocalizations>(
+        lookupSharezoneLocalizations(locale));
+  }
+
+  @override
+  bool isSupported(Locale locale) =>
+      <String>['de', 'en'].contains(locale.languageCode);
+
+  @override
+  bool shouldReload(_SharezoneLocalizationsDelegate old) => false;
+}
+
+SharezoneLocalizations lookupSharezoneLocalizations(Locale locale) {
+  // Lookup logic when only language code is specified.
+  switch (locale.languageCode) {
+    case 'de':
+      return SharezoneLocalizationsDe();
+    case 'en':
+      return SharezoneLocalizationsEn();
+  }
+
+  throw FlutterError(
+      'SharezoneLocalizations.delegate failed to load unsupported locale "$locale". This is likely '
+      'an issue with the localizations generation tool. Please file an issue '
+      'on GitHub with a reproducible sample app and the gen-l10n configuration '
+      'that was used.');
+}
diff --git a/lib/sharezone_localizations/lib/localizations/sharezone_localizations_de.gen.dart b/lib/sharezone_localizations/lib/localizations/sharezone_localizations_de.gen.dart
new file mode 100644
index 000000000..6c386da48
--- /dev/null
+++ b/lib/sharezone_localizations/lib/localizations/sharezone_localizations_de.gen.dart
@@ -0,0 +1,37 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+import 'sharezone_localizations.gen.dart';
+
+// ignore_for_file: type=lint
+
+/// The translations for German (`de`).
+class SharezoneLocalizationsDe extends SharezoneLocalizations {
+  SharezoneLocalizationsDe([String locale = 'de']) : super(locale);
+
+  @override
+  String get appName => 'Sharezone';
+
+  @override
+  String get commonActionsCancel => 'Abbrechen';
+
+  @override
+  String get commonActionsConfirm => 'Bestätigen';
+
+  @override
+  String get languagePageTitle => 'Sprache';
+
+  @override
+  String get languageSystemName => 'System';
+
+  @override
+  String get languageDeName => 'Deutsch';
+
+  @override
+  String get languageEnName => 'Englisch';
+}
diff --git a/lib/sharezone_localizations/lib/localizations/sharezone_localizations_en.gen.dart b/lib/sharezone_localizations/lib/localizations/sharezone_localizations_en.gen.dart
new file mode 100644
index 000000000..c9f69a680
--- /dev/null
+++ b/lib/sharezone_localizations/lib/localizations/sharezone_localizations_en.gen.dart
@@ -0,0 +1,37 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+import 'sharezone_localizations.gen.dart';
+
+// ignore_for_file: type=lint
+
+/// The translations for English (`en`).
+class SharezoneLocalizationsEn extends SharezoneLocalizations {
+  SharezoneLocalizationsEn([String locale = 'en']) : super(locale);
+
+  @override
+  String get appName => 'Sharezone';
+
+  @override
+  String get commonActionsCancel => 'Cancel';
+
+  @override
+  String get commonActionsConfirm => 'Confirm';
+
+  @override
+  String get languagePageTitle => 'Language';
+
+  @override
+  String get languageSystemName => 'System';
+
+  @override
+  String get languageDeName => 'German';
+
+  @override
+  String get languageEnName => 'English';
+}
diff --git a/lib/sharezone_localizations/lib/sharezone_localizations.dart b/lib/sharezone_localizations/lib/sharezone_localizations.dart
new file mode 100644
index 000000000..04faf59b9
--- /dev/null
+++ b/lib/sharezone_localizations/lib/sharezone_localizations.dart
@@ -0,0 +1,13 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+export 'localizations/sharezone_localizations.gen.dart';
+export 'src/app_locale_gateway.dart';
+export 'src/app_locale_provider.dart';
+export 'src/app_locale.dart';
+export 'src/context_extension.dart';
diff --git a/lib/sharezone_localizations/lib/src/app_locale.dart b/lib/sharezone_localizations/lib/src/app_locale.dart
new file mode 100644
index 000000000..3b47779b3
--- /dev/null
+++ b/lib/sharezone_localizations/lib/src/app_locale.dart
@@ -0,0 +1,91 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/widgets.dart';
+import 'package:sharezone_localizations/sharezone_localizations.dart';
+
+/// A wrapper around [Locale] to provide differentiation between the system
+/// locale and the user selected locale.
+enum AppLocale {
+  system,
+  en,
+  de;
+
+  /// Converts the enum value to a [Locale] object.
+  Locale toLocale() {
+    return switch (this) {
+      system => getSystemLocale(),
+      en => const Locale('en'),
+      de => const Locale('de'),
+    };
+  }
+
+  /// Returns the name of the locale in the native language, e.g. "Deutsch" for
+  /// the [AppLocale.de] enum value.
+  String getNativeName(BuildContext context) {
+    return switch (this) {
+      system => context.l10n.languageSystemName,
+      en => 'English',
+      de => 'Deutsch',
+    };
+  }
+
+  /// Returns the name of the locale in the currently selected language, e.g.
+  /// "German" for the [AppLocale.de] enum value when the app is in English.
+  String getTranslatedName(BuildContext context) {
+    return switch (this) {
+      system => context.l10n.languageSystemName,
+      en => context.l10n.languageEnName,
+      de => context.l10n.languageDeName,
+    };
+  }
+
+  /// The system-reported default locale of the device.
+  static Locale getSystemLocale() {
+    return PlatformDispatcher.instance.locale;
+  }
+
+  static AppLocale fromMap(Map<String, dynamic>? map) {
+    if (map == null || map['isSystem'] as bool) {
+      return system;
+    }
+    return fromLanguageTag(map['languageTag']);
+  }
+
+  Map<String, dynamic> toMap() {
+    return {
+      'isSystem': isSystem(),
+      'languageTag': _toLanguageTag(),
+    };
+  }
+
+  bool isSystem() {
+    return this == system;
+  }
+
+  /// Returns a syntactically valid Unicode BCP47 Locale Identifier.
+  ///
+  /// Some examples of such identifiers: "en", "es-419", "hi-Deva-IN" and
+  /// "zh-Hans-CN". See http://www.unicode.org/reports/tr35/ for technical
+  /// details.
+  String _toLanguageTag() {
+    return toLocale().toLanguageTag();
+  }
+
+  /// Returns the enum value for the given language tag.
+  ///
+  /// If the language tag is not supported, the system locale is returned.
+  static AppLocale fromLanguageTag(String languageTag) {
+    final languageCode = languageTag.split('-').first;
+    return AppLocale.values.firstWhere(
+      (element) => element.name == languageCode,
+      orElse: () => system,
+    );
+  }
+}
diff --git a/lib/sharezone_localizations/lib/src/app_locale_gateway.dart b/lib/sharezone_localizations/lib/src/app_locale_gateway.dart
new file mode 100644
index 000000000..15c6172c0
--- /dev/null
+++ b/lib/sharezone_localizations/lib/src/app_locale_gateway.dart
@@ -0,0 +1,41 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+import 'package:sharezone_localizations/sharezone_localizations.dart';
+
+/// Gateway to store and retrieve the locale of the app.
+///
+/// This can be implemented using shared preferences or a remote service like
+/// Firestore. The [AppLocaleProvider] listens to changes in the locale and
+/// updates the UI accordingly.
+abstract class AppLocaleProviderGateway {
+  const AppLocaleProviderGateway();
+
+  Stream<AppLocale> getLocale();
+
+  Future<void> setLocale(AppLocale locale);
+}
+
+/// A mock implementation of the [AppLocaleProviderGateway].
+class MockAppLocaleProviderGateway implements AppLocaleProviderGateway {
+  MockAppLocaleProviderGateway({
+    AppLocale initialLocale = AppLocale.system,
+  }) : _locale = initialLocale;
+
+  AppLocale _locale;
+
+  @override
+  Stream<AppLocale> getLocale() {
+    return Stream.value(_locale);
+  }
+
+  @override
+  Future<void> setLocale(AppLocale locale) async {
+    _locale = locale;
+  }
+}
diff --git a/lib/sharezone_localizations/lib/src/app_locale_provider.dart b/lib/sharezone_localizations/lib/src/app_locale_provider.dart
new file mode 100644
index 000000000..1e32f8f5f
--- /dev/null
+++ b/lib/sharezone_localizations/lib/src/app_locale_provider.dart
@@ -0,0 +1,45 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:sharezone_localizations/sharezone_localizations.dart';
+
+/// Allows to change the locale of the app using the provider package.
+class AppLocaleProvider with ChangeNotifier {
+  AppLocaleProvider({
+    AppLocale initialLocale = AppLocale.system,
+    required this.gateway,
+  }) : _locale = initialLocale {
+    _subscription = gateway.getLocale().listen((event) {
+      _locale = event;
+      notifyListeners();
+    });
+  }
+
+  AppLocaleProviderGateway gateway;
+  late StreamSubscription<AppLocale> _subscription;
+  AppLocale _locale;
+
+  AppLocale get locale => _locale;
+
+  set locale(AppLocale newLocale) {
+    if (_locale != newLocale) {
+      _locale = newLocale;
+      gateway.setLocale(newLocale);
+      notifyListeners();
+    }
+  }
+
+  @override
+  void dispose() {
+    _subscription.cancel();
+    super.dispose();
+  }
+}
diff --git a/lib/sharezone_localizations/lib/src/context_extension.dart b/lib/sharezone_localizations/lib/src/context_extension.dart
new file mode 100644
index 000000000..aa8724134
--- /dev/null
+++ b/lib/sharezone_localizations/lib/src/context_extension.dart
@@ -0,0 +1,28 @@
+// Copyright (c) 2024 Sharezone UG (haftungsbeschränkt)
+// Licensed under the EUPL-1.2-or-later.
+//
+// You may obtain a copy of the Licence at:
+// https://joinup.ec.europa.eu/software/page/eupl
+//
+// SPDX-License-Identifier: EUPL-1.2
+
+import 'package:flutter/widgets.dart';
+import 'package:sharezone_localizations/sharezone_localizations.dart';
+
+extension SharezoneLocalizationsContextExtension on BuildContext {
+  /// Extension on [BuildContext] to access the [SharezoneLocalizations] object.
+  ///
+  /// Requires the SharezoneLocalizations to be available in the context,
+  /// otherwise it will throw an exception. Add
+  /// [SharezoneLocalizations.delegate] to the underlying App
+  /// localizationsDelegates, for access in the context of the app.
+  SharezoneLocalizations get l10n {
+    final localizations = SharezoneLocalizations.of(this);
+    if (localizations == null) {
+      throw FlutterError('SharezoneLocalizations not found.\n'
+          'Did you forget to add SharezoneLocalizations.delegate to your '
+          'MaterialApp/CupertinoApp localizationsDelegates?');
+    }
+    return localizations;
+  }
+}
diff --git a/lib/sharezone_localizations/pubspec.lock b/lib/sharezone_localizations/pubspec.lock
new file mode 100644
index 000000000..55e875987
--- /dev/null
+++ b/lib/sharezone_localizations/pubspec.lock
@@ -0,0 +1,124 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.0"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.18.0"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_lints:
+    dependency: transitive
+    description:
+      name: flutter_lints
+      sha256: "9e8c3858111da373efc5aa341de011d9bd23e2c5c5e0c62bccf32438e192d7b1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  flutter_localizations:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  intl:
+    dependency: "direct main"
+    description:
+      name: intl
+      sha256: d6f56758b7d3014a48af9701c085700aac781a92a87a62b1333b46d8879661cf
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.19.0"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      sha256: cbf8d4b858bb0134ef3ef87841abdf8d63bfc255c266b7bf6b39daa1085c4290
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      sha256: f7142bb1154231d7ea5f96bc7bde4bda2a0945d2806bb11670e30b850d56bdec
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.11.1"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: bdb68674043280c3428e9ec998512fb681678676b3c54e773629ffe74419f8c7
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.15.0"
+  nested:
+    dependency: transitive
+    description:
+      name: nested
+      sha256: "03bac4c528c64c95c722ec99280375a6f2fc708eec17c7b3f07253b626cd2a20"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.9.0"
+  provider:
+    dependency: "direct main"
+    description:
+      name: provider
+      sha256: c8a055ee5ce3fd98d6fc872478b03823ffdb448699c6ebdbbc71d59b596fd48c
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.1.2"
+  sharezone_lints:
+    dependency: "direct main"
+    description:
+      path: "../sharezone_lints"
+      relative: true
+    source: path
+    version: "1.0.0"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+sdks:
+  dart: ">=3.3.0-0 <4.0.0"
+  flutter: ">=1.16.0"
diff --git a/lib/sharezone_localizations/pubspec.yaml b/lib/sharezone_localizations/pubspec.yaml
new file mode 100644
index 000000000..04cbc554a
--- /dev/null
+++ b/lib/sharezone_localizations/pubspec.yaml
@@ -0,0 +1,28 @@
+# Copyright (c) 2023 Sharezone UG (haftungsbeschränkt)
+# Licensed under the EUPL-1.2-or-later.
+#
+# You may obtain a copy of the Licence at:
+# https://joinup.ec.europa.eu/software/page/eupl
+#
+# SPDX-License-Identifier: EUPL-1.2
+
+name: sharezone_localizations
+version: 1.0.0
+description: Translations for the Sharezone app
+publish_to: "none"
+
+environment:
+  sdk: ">=3.0.0 <4.0.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+  flutter_localizations:
+    sdk: flutter
+  intl: any
+  sharezone_lints:
+    path: ../sharezone_lints
+  provider: ^6.0.3
+
+flutter:
+  generate: true
diff --git a/licenses_config.yaml b/licenses_config.yaml
index 997e8f5ed..b1de13c5b 100644
--- a/licenses_config.yaml
+++ b/licenses_config.yaml
@@ -85,4 +85,5 @@ packageLicenseOverride:
   user: EUPL-1.2-or-later
   util: EUPL-1.2-or-later
   test_randomness: EUPL-1.2-or-later
-  feedback_shared_implementation: EUPL-1.2-or-later
\ No newline at end of file
+  feedback_shared_implementation: EUPL-1.2-or-later
+  sharezone_localizations: EUPL-1.2-or-later
\ No newline at end of file