We're not talking about postmodernism here, though, are we? We're talking about anachronism, where modern concepts and language are used instead of what we believe a medieval setting should use.
If that is the case, then of course we're going to use somewhat anachronistic concepts and language. The game, while set in a medieval-ish European-ish setting, is made for a modern audience to enjoy. You don't want people speaking in late Middle / early Modern English, as not everyone is familiar with such language. You also don't want realism because it's usually the antithesis of fun.
Games and stories are fictitious. They are not completely real, and usually aren't even realistic. Note that no one goes to the bathroom or has to eat or sleep, and time flows only when we say it does. Characters are exaggerated, a little melodramatic, and the story is high adventure where the protagonist will ultimately triumph. He will not age, will not suffer from gout, won't be laid up with the pox, doesn't take a half hour to don his armour, and speaks in language that is easily understandable and relatable to a modern audience, which is who we have targeted for this game and who will ultimately buy this game.
It is not a historical simulation, and doesn't even take place on Earth. It is fiction and follows the rules we, its creators, have set out for it. Complaints about it not being "realistic" are generally misguided. Discussion of real-world religions, sexual politics are not only inappropriate for the setting, but for the forum as well. Let's keep it game-related.