If your React Native app only speaks English, you're leaving ~75% of smartphone users on the table. Here's the modern stack for shipping a multilingual Expo app without three days of glue code. The Stack react-i18next : translation management (6M+ weekly downloads, TS-first) expo-localization : device locale detection (or react-native-localize for bare RN) Intl : dates, numbers, currencies (built into Hermes) I18nManager : RTL layout flipping Setup...