Re: Why can't players from certain countries change their game language?
That's a problem for a lot of players who had to repair their game. https://answers.ea.com/t5/Technical-Issues-PC/Sims-4-launched-in-Czech-Reinstalled-game-now-only-gives-me-3/m-p/12455150#M249211
You could download the free version of the basegame, maybe that will change it to English.
