class.dart

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter I18n',
      debugShowCheckedModeBanner: false,
      theme: new ThemeData(
        primarySwatch: Colors.green,
      ),
      home: new MyHomePage(),
      localizationsDelegates: [
        FlutterI18nDelegate(
            useCountryCode: false, fallbackFile: 'fr', path: 'assets/i18n'),
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate
      ],
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  MyHomeState createState() => new MyHomeState();
}