Anyone with a text editor (Notepad++ for example) and UnRen can make changes to Ren'Py games, including translations. I clean up typos and grammatical errors in a lot of Ren'Py games that I play, though that's one thing, this is completely different. This being a Unity game, you can't do that and expect the game not to crash. I've actually seen it happen when a player made an Italian mod for MwM (since that language is not supported) and the game crashed as a result. He then came on to Discord expecting me to fix the issue that he created himself by modding the game to support his native tongue. It didn't end well for him.
At any rate, as I've mentioned quite a few times before (I hate repeating myself, but it looks like I have to in order to clear the air here), the languages that were in MotH before its release on Steam were removed from the game due to lack of sales in those countries (Italy, Poland and Turkey). As a result, they
will not be included in this game. Faerin isn't going to add any additional support for other languages just to appease pirates or for one player. Although offering to translate the game is a generous offer, it's just not going to happen.