It turned out that we here at my company created a test locale, but it wasn’t finished (not even started, per se), but we had a file remaining on the server that the discourse thought to be a valid locale file. That’s why I could find _hu, even if it wasn’t finished on our side.
So the mistake was on our side as we didn’t cooperate and talk it through.
Still, it might pose a bug, as discourse didn’t know how to handle this situ but came back blank instead. Might be worth looking into.
Thanks for the help and the quick response, saved my day. Cheers!