With Tynan's blessings, I have started a full translation of Rimworld into Bulgarian. It is now complete, and the online repository is fully updated. Here's a showcase video in English that it works without errors:
https://www.youtube.com/watch?v=_71Wox4H5UQ
I will do my best to update it for future releases as well, and there will surely be some delay between release and update, as I have to do everything only own for now.