Language on the sims 4 won't change

@lisaemaxime It's not as easy as it was in Origin by just changing launch settings.
For EA App, the only way to change the language is to uninstall the game and when reinstalling, picking the desired language as installation language.

Another way -for now- is to just reinstall the Origin launcher (https://www.dm.origin.com/download) and keep using that with the set language. You don't need to uninstall EA app to install Origin, but they can't run at the same time.