diff --git a/lib/api/auth/oauth.dart b/lib/api/auth/oauth.dart
index 0f5d8da..8b13789 100644
--- a/lib/api/auth/oauth.dart
+++ b/lib/api/auth/oauth.dart
@@ -1,7 +1 @@
-import 'package:http/http.dart' as http;
-import 'dart:io';
 
-import 'package:oauth2/oauth2.dart' as oauth2;
-
-// Future<http.Client> authorize({required String userid}) {
-// }
diff --git a/lib/i18n/de_DE.json b/lib/i18n/de_DE.json
new file mode 100644
index 0000000..7234b8b
--- /dev/null
+++ b/lib/i18n/de_DE.json
@@ -0,0 +1,9 @@
+{
+    "greeting": "hallo!", 
+    "user-id-not-valid": "Hmm... die id sieht nicht ganz richtig aus...",
+    "user-id": "nutzer id",
+    "user-id-example": "nutzer@beispiel.de",
+    "authorize-in-browser": "im browser autorisieren",
+    "login-failed-snackbar-text": "login fehlgeschlagen!"
+}
+  
\ No newline at end of file
diff --git a/lib/i18n/en_US.json b/lib/i18n/en_US.json
index b3add8c..5ea0d46 100644
--- a/lib/i18n/en_US.json
+++ b/lib/i18n/en_US.json
@@ -3,6 +3,7 @@
     "user-id-not-valid": "Sorry, this user id doesn't look quite right... ",
     "user-id": "user id",
     "user-id-example": "user@example.com",
-    "authorize-in-browser": "authorize in browser"
+    "authorize-in-browser": "authorize in browser",
+    "login-failed-snackbar-text": "login failed!"
 }
   
\ No newline at end of file
diff --git a/lib/main.dart b/lib/main.dart
index 23fd812..ea09307 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -2,12 +2,31 @@ import 'package:flutter/material.dart';
 import 'package:localization/localization.dart';
 import 'package:slothmu/partials/main_scaffold.dart';
 import 'pages/login.dart';
+import 'package:flutter_localizations/flutter_localizations.dart';
 
-void main() => runApp(MaterialApp(
+void main() => runApp(const Slothmu());
+
+class Slothmu extends StatefulWidget {
+  const Slothmu({Key? key}) : super(key: key);
+
+  @override
+  State<Slothmu> createState() => _SlothmuState();
+}
+
+class _SlothmuState extends State<Slothmu> {
+  @override
+  Widget build(BuildContext context) {
+    LocalJsonLocalization.delegate.directories = ['lib/i18n'];
+    return MaterialApp(
       supportedLocales: const [
         Locale("en", "US"),
+        Locale("de", "DE"),
       ],
+      locale: const Locale("de", "DE"),
       localizationsDelegates: [
+        GlobalCupertinoLocalizations.delegate,
+        GlobalWidgetsLocalizations.delegate,
+        GlobalMaterialLocalizations.delegate,
         LocalJsonLocalization.delegate,
       ],
       initialRoute: '/login',
@@ -15,4 +34,6 @@ void main() => runApp(MaterialApp(
         '/': (context) => const MainScaffold(),
         '/login': (context) => const Login(),
       },
-    ));
+    );
+  }
+}
diff --git a/lib/pages/login.dart b/lib/pages/login.dart
index 83c0c9e..761a17e 100644
--- a/lib/pages/login.dart
+++ b/lib/pages/login.dart
@@ -60,7 +60,11 @@ class _LoginFormState extends State<LoginForm> {
           ),
           TextButton.icon(
               onPressed: () {
-                formKey.currentState!.validate();
+                bool isValid = formKey.currentState!.validate();
+                if (!isValid) {
+                  ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                      content: Text("login-failed-snackbar-text".i18n())));
+                }
               },
               icon: const Icon(Icons.login),
               label: Text("authorize-in-browser".i18n()))
diff --git a/pubspec.lock b/pubspec.lock
index 4be8afd..650a78f 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -43,13 +43,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.16.0"
-  crypto:
-    dependency: transitive
-    description:
-      name: crypto
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.0.2"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -76,6 +69,11 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.1"
+  flutter_localizations:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -95,6 +93,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.0.1"
+  intl:
+    dependency: transitive
+    description:
+      name: intl
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.17.0"
   lints:
     dependency: transitive
     description:
@@ -130,13 +135,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.7.0"
-  oauth2:
-    dependency: "direct main"
-    description:
-      name: oauth2
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.0"
   path:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index 7bed065..43f05e7 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -29,6 +29,8 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  flutter_localizations: # Add this line
+    sdk: flutter
 
 
   # The following adds the Cupertino Icons font to your application.
@@ -36,7 +38,6 @@ dependencies:
   cupertino_icons: ^1.0.2
   settings_ui: ^2.0.2
   http: ^0.13.4
-  oauth2: ^2.0.0
   localization: ^2.1.0
 
 dev_dependencies: