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Localizing our projects provides us with an easy way to change the language or experience for users in different countries.

Here's an example.

If your apps primary Locale was en (English) and you wanted to also provide users in Spain with a Spanish version, localising the app would be your best option.

Adding Localized files

We include a lang directory in the project that can be found at the root of the project. Inside here, you'll be able to include .json files for each locale. E.g. es.json for Spanish or pt.json for Portuguese.

Example: en.json

  "documentation": "documentation",
  "changelog": "changelog"

Example: es.json

  "documentation": "documentación",
  "changelog": "registro de cambios"

Once you’ve added the .json files, you’ll then need to include them within your pubspec.yaml file.

Go to your pubspec.yaml file and then at the assets section, add the new files.

You can include as many locale files here but make sure you also include them within your pubspec.yaml assets.

Localizing text

You can localize any text with a BuildContext and key from a lang .json file.

trans(context, "documentation");

This will return the value of the key depending on the current Locale assigned.

Updating the locale

Updating the locale in the app is simple in Nylo, you can use the below method in your widget.

  AppLocale.instance.updateLocale(context, Locale('es'));

What this will do is update the locale to (Spanish which is) es. Any reference to trans() keys will be automatically updated to use the es.json.

This can be extremely useful if you wanted to provide users with an options menu to select a language to use in the app. E.g. if they navigated to a settings screen with language flags and selected Spanish.

Setting a default locale

You may want to update the default locale when users open your app for the first time, follow the steps below to see how.

  1. First, open the main.dart file.
  2. Next update the AppLocale.instance.locale property to your Locale like the below example.
// updated locale
AppLocale.instance.locale = Locale('es');

    navigatorKey: router.navigatorKey,
    onGenerateRoute: router.generator(),
    darkTheme: darkTheme(),
    themeData: defaultTheme(),
    locale: AppLocale.instance.locale,

Locale support

Nylo currently supports these locales.