HannesC said in game translation:
You can change the language through Steam if you own it. Ofcourse putting random files from the internet isn't encouraged especially if you don't know what you're doing, and can probably break your game.
Hello thanks for answering the game did not break so I think I was lucky because although it takes 1 minute to load the menu when entering it is fully playable the multiplayer has not tested it yet but if I had no problems with the zombies with the multiplayer I do not think