Hi! This is an amazing project and will be really useful! Thank you!
I understand that the project is funded by EU so the focus is on European languages but are there any plans to add CJK or other languages ?
Yes, that's something we've been discussing internally and is being considered. In this meantime, please feel free to file an issue in the repo [1] so we could track it:
[1] https://github.com/mozilla/firefox-translations/issues