Some versions of Sims 4 are language-locked, meaning you only have access to one or a few languages rather than all of them. This is tied to the region in which the game was bought or claimed and is by design.
The old workaround was to buy the game from a location that didn't have a language lock, thereby receiving the global version. Unfortunately, since Sims 4 is now free, that's not really an option anymore. If your account receives a language-locked version, you're stuck with it, and Mac users don't even have the option to install through Epic or Steam since those versions are Windows-only.
If you don't live in a country where these languages make sense, you could contact EA customer support and try to figure out why you received this version. Support generally won't replace this with the global version unless there's some kind of mistake, for example when someone already has the global version but the language-locked version is overriding it, but it doesn't hurt to ask.