I saw saw this complaint somewhere elso too. It can be done but it will be alot of work... it's a lot of text. Sometimes a "Du" might be better. .E.g. a child talks to his father.. or a close friend talks to you, etc. "Du" isn't wrong, because we don't know the language customs in this new world. It doesn't need to be changed to the formal "Ihr" all the time. But all the "sie"s should be changed to "ihr". "Sie" is a real immersion breaker for me. Too modern for this fantasy world.