Firebase远程配置-语言条件不起作用-android

我正在我的应用程序中使用firebase远程配置。我有两个参数message1和message2,如下图所示。图像中也可以看到语言条件(阿拉伯语和法语)。

            Locale locale = new Locale("ar");//or "fr" if user selects french
            Locale.setDefault(locale);
            Configuration configuration = new Configuration();
            configuration.locale = locale;
            getResources().updateConfiguration(configuration, getResources().getDisplayMetrics());

这是我用来从firebase获取数据的代码:

mFirebaseRemoteConfig = FirebaseRemoteConfig.getInstance();
mFirebaseRemoteConfig.setDefaults(R.xml.remote_config_defaults);

long cacheExpiration = 0;
mFirebaseRemoteConfig.fetch(cacheExpiration)
        .addOnCompleteListener(MainActivity.this, new OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task) {
                if (task.isSuccessful()) {
                    Toast.makeText(MainActivity.this, "Fetch Succeeded",
                            Toast.LENGTH_SHORT).show();

                    // After config data is successfully fetched, it must be activated before newly fetched
                    // values are returned.
                    mFirebaseRemoteConfig.activateFetched();
                } else {
                    Toast.makeText(MainActivity.this, "Fetch Failed",
                            Toast.LENGTH_SHORT).show();
                }
                String welcomeMessage1 = mFirebaseRemoteConfig.getString("message1");
                String welcomeMessage2 = mFirebaseRemoteConfig.getString("message2");
            }
        });

现在的问题是,每当我试图从服务器获取消息1和消息2时,它只返回默认的英语文本,而不会返回相应的阿拉伯语或法语区域设置文本。这是为什么?请帮忙。