Question 1

How do I mock react-native-localize for Jest testing?

Accepted Answer

The library provides a default mock that you can import in your __mocks__ directory, as shown in the testing section. Simply export from 'react-native-localize/mock' to simulate locale data in unit tests without native modules.

Question 2

Can I dynamically change the app language with react-native-localize?

Accepted Answer

react-native-localize reads device settings, so for in-app language switching, you need to override its data or use a state management solution alongside it. The openAppLanguageSettings method only redirects to system settings on Android 13+.

Question 3

react-native-localize vs i18next: which one should I use for React Native?

Accepted Answer

Use react-native-localize for accessing device locale settings like language and region, and i18next for managing translation strings. They are complementary; many apps use both together, with react-native-localize feeding locale data into i18next.

Question 4

How to handle right-to-left (RTL) layouts with react-native-localize?

Accepted Answer

The getLocales method returns an isRTL flag for each locale. Use this flag from findBestLanguageTag or directly to conditionally apply RTL styles in your components, ensuring proper layout for languages like Arabic or Hebrew.

Question 5

Does react-native-localize work with React Native Web?

Accepted Answer

Yes, it supports React Native Web by using navigator.languages on the client. Follow the official React Native Web guide to configure webpack, as mentioned in the README, but note that some device-specific features may not apply on web.

Question 6

How to set up react-native-localize with Expo?

Accepted Answer

Add the Expo plugin to your app.json or app.config.js, specifying supported locales in the plugins array. This enables Android 13+ and iOS to show your app in system language settings, as detailed in the setup section with dynamic and static configuration examples.

react-native-languages

What is react-native-languages?

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