return MaterialApp(

             // ...

             initialRoute: initialRoute,
-            supportedLocales: GalleryLocalizations.supportedLocales,
+            supportedLocales: [
+              const Locale('en'),
+              const Locale('he'),
+            ],
             locale: GalleryOptions.of(context).locale,
             localeResolutionCallback: (locale, supportedLocales) {
               deviceLocale = locale;
               return locale;
             },

// ...