This might help you it's been couple month from now. Perhaps there are more localisation modules out there. But if you wish to do something simple and bypass using so many modules (we only use essential modules lessen the load), here's the setup: let's say we have a root page and login page (on our router setup, things are based on root page)
wish helps you For what it's worth react-intl is very good. I used it on an enterprise level web application this past year, and I couldn't have been happier with it. The maintainers (I believe they are at Yahoo) are very pleasant and responded to any issues I had promptly. I am not aware of any comparable libraries.
Use RTL Direction when Localization is LTR In React Native