If you need to update the entire game to a different language, you generally cannot do this inside the game menu. You must use your game launcher:
: Right-click The Sims 4 in your Library, select Properties > General , and choose your language from the dropdown. sims 4 language strings upd
This guide covers everything from basic language switching to advanced mod translation updates. 1. How to Update Your Game Language If you need to update the entire game