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The Flutter GetX Ecosystem

Localization

Learn to make our app more accessible by making it multilingual.

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Introduction to localization using GetX

Today’s world is truly global and applications have far more reach than a single country and language. Modern apps must be multilingual to be used by everyone irrespective of the person’s language. Let us understand how GetX helps us implement localization in our apps.

GetX provides us a place to store the string translations in the form of the Translations class. It also provides extensions to translate the text in the app based on its locale (language). We can define the app’s locale and load the translations in GetMaterialApp. And, update the locale at any time with a single method. Further in this lesson, we will discuss each feature in detail.

The Translations class

Translations class is the place to store the translations for the text that will be used in our app. We extend it and place all the data in its keys map. The translations are categorized by the language. So for each language, we maintain a map of all the strings to their translations in that language. The strings that are used as keys should be consistent for every language. For example, in the code below, the key greeting is the same in every language. Only its value, i.e., the translation is different in each map.

Dart
class TranslationData extends Translations {
  @override
  Map<String, Map<String, String>> get keys => {
        'en_US': {
          'greeting': 'Greetings, %s!',
          'welcome': 'Welcome to the app, @name!',
          'status': 'Your account status is: @status',
          'product': 'Product',
          'products': 'I have @count products',
        },
        'de_DE': {
          'greeting': 'Herzlich willkommen, %s!',
          'welcome': 'Willkommen in der App, @name!',
          'status': 'Ihr Kontostatus lautet: @status',
          'product': 'Produkt',
          'products': 'Ich habe @count Produkte',
        },
        'fr_FR': {
          'greeting': 'Salutations, %s!',
          'welcome': 'Bienvenue dans l\'application, @name!',
          'status': 'Votre statut de compte est: @status',
          'product': 'Produit',
          'products': 'J\'ai @count produits',
        },
        'es_ES': {
          'greeting': '¡Saludos, %s!',
          'welcome': 'Bienvenido/a a la aplicación, @name!',
          'status': 'El estado de tu cuenta es: @status',
          'product': 'Producto',
          'products': 'Tengo @count productos',
        },
        'ja_JP': {
          'greeting': 'こんにちは、%sさん!',
          'welcome': 'アプリへようこそ、@nameさん!',
          'status': 'アカウントのステータスは: @statusです',
          'product': '製品',
          'products': '私は@count個の製品を持っています',
        },
      };
}

keys maps a language and country code (en_US stands for English-USA) to another map that contains the key-value pairs of localized strings.

Loading translations and defining locale

Now that we have our translations data in place, we can load it in GetMaterialApp that makes it available throughout the application.

Dart
GetMaterialApp(
  translations: TranslationData(),
);

Next step is to define the app locale, i.e., the language ...