I’m not sure if this will help but I think that you just have to type in the “Translation here” box and maybe save it. MAYBE it’ll work. I’m not sure because I haven’t tried it out myself. I hope this helps.
Ended up just writing the Japanese translations myself since I study it anyways. Would still like to know why auto translate isn’t working correctly for my other languages though? Is it a bug…?
You can try reporting it as a bug on the developer forum. Maybe a Roblox developer will view your problem and tell you the solution. (or just tell you that it is a bug and that they’re still working on it)