react-i18next

https://github.com/i18next/react-i18next/tree/master/example/react-native

FBT

https://github.com/facebook/fbt/tree/rn-demo-app

react-native-i18n

https://github.com/AlexanderZaytsev/react-native-i18n

react-native-localize

https://github.com/zoontek/react-native-localize

lokalise (premuim)

https://lokalise.com

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GitHub Student Developer Pack

POEditor no RN support

Crowdin

https://github.com/crowdin/react-native-sdk

Phrase

https://help.phrase.com/help/react-native-sdk-installation-instructions

Transifex Native

https://developers.transifex.com/docs/react-native-sdk

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Pseudolocalisation: testing internationalisation aka testing another (a pseudo) language