change button language

covas_mobile/lib/main.dart

@@ -1,12 +1,20 @@
 import 'package:flutter/material.dart';
 import 'package:google_mobile_ads/google_mobile_ads.dart';
+import 'package:provider/provider.dart';
+
 import 'pages/LoginDemo.dart';
+import 'locale_provider.dart'; // <-- à adapter selon ton arborescence
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await MobileAds.instance.initialize();
 
-  runApp(MyApp());
+  runApp(
+    ChangeNotifierProvider(
+      create: (_) => LocaleProvider(),
+      child: MyApp(),
+    ),
+  );
 }
 
 class MyApp extends StatelessWidget {