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You can use this module to Localize your app, and access the locale data on the native device.
Using the popular library i18n-js with expo-localization will enable you to create a very accessible experience for users.
This API is mostly synchronous and driven by constants. On iOS the constants will always be correct, on Android you should check if the locale has updated using AppState and Localization.getLocalizationAsync(). Initally the constants will be correct on both platforms, but on Android a user can change the language and return, more on this later.
Native device language, returned in standard format. Ex: en, en-US, es-US.
List of all the native languages provided by the user settings. These are returned in the order the user defines in their native settings.
Country code for your device.
A list of all the supported ISO codes.
The current time zone in display format. ex: America/Los_Angeles
This will return true if the current language is Right-to-Left.