I’ve thought it would be a nice idea to add more languages to my game besides English. Of course, I will get some people to translate the game, and of course, pay them for that. Using filtering enabled will make this possible by the way.
Will adding new language options, get my game suspended?
I don’t see why not. There are no rules against it I don’t believe.
@ the Localization Service
There are already games which do.
Even the Roblox chat system checks for player’s localization and it’s displayed in for example Spanish and many other language.
It’s not feature only for coreguis so check out localizationservice.
I am sure it will satisfy you. Roblox even made a translating API Documentation - Roblox Creator Hub (you enter a table of message in some languages and then you just call something like showing text with id… in f.e. Spanish language).
Check out it!
Don’t pass player input through translators
However button / input / dialogue UIs are fine 
I am talking about some function I have seen in roblox chat scripts. Roblox made an API which is pretty hard to find, but useful to use.