Snouldn't "Charlemagne" instead of french prounouncation called german or latin way, "Karl der Grosse" or "Karolus Magnus"?
The game takes place in Skandinavia, there was no french speakers here, and king Karl himelf came from german and latin speaking elite. It sorta breaks the immersion, that person wasn't called modern anglo-french way in this region especially when he was alive.