Derive language from system and connect it to the game

The Minecraft Launcher has a great set of languages, but many players are unaware of them as the default is still English for everyone.

What about automatically choosing the language according to the one set in the system? Or if that proves inefficient for some reason, geolocating the IP-address could work too.

The second part of the request is launching the game in the same language as the launcher, in order to improve the accessibility and find-ability of that too. If possible, changing the language in the game could also change the language of the launcher.