I created a Nostr localization tracker on GitHub. It tracks how well localized Nostr clients are in different languages, and which ones support automatic content translations. Contributions are welcome. Let's globalize Nostr and make it truly accessible for everyone.

Disclaimer: it is by no means exhaustive in the list of clients or languages, and it does not keep track of percentage of translated strings or quality of translations.

https://github.com/tyiu/nostr-localization-tracker