The sims language is called Simlish. It was created by EA.
Chat with our AI personalities
Simlish, a language made for the sims and the sims alone no one can find out what their saying. Not really gibberish but its a scrambling of each and every language in the world.
You can not change the language.
C++
You can choose the language that text will appear in, but the people will still speak "Similish".
Go to China and find the language school building and play the game