Flutter Localize Syncfusion Calender with GetX

I am using the Syncfusion Calender in my app. The problem is that I would like to localize it but I can not make it work... I checked there documentation, but the given example is working with the normal MaterialApp. I am using GetX, also for Localization.

How can I localize the calender with my GetXApp?

This is my App:

@override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        ChangeNotifierProvider(
          create: (context) => DataProvider(),
        ),
      ],
      child: GetMaterialApp(
        title: 'Flutter Boilerplate',
        navigatorKey: Get.key,
        translationsKeys: AppTranslation.translationsKeys,
        locale: locale,
        fallbackLocale: fallbackLocale,
        theme: ThemeData(
          fontFamily: AppTextStyles.montserrat,
          primarySwatch: ColorService.createMaterialColor(
            AppColors.blue,
          ),
          backgroundColor: AppColors.white,
          scaffoldBackgroundColor: AppColors.white,
        ),
        initialRoute: Views.home,
        onGenerateRoute: AppRouter.generateRoute,
      ),
    );
  }

Couldn't find anything on this... Every help is appreciated :)