During loading, in the bottom lefthand corner of the game window, it states 'Processing device information'. I think it's at this point that any language you have set, gets changed to the language that your computer is set to.
So I would guess that if you want the game to open in another language, you would have to set your computer to that language. Or create another user account on your computer, set that account to the language you want to play in, and switch to that account when you want to play.
What a fuss that is!