That is a good catch. I'll be honest, I didn't think that far into it. To be fair though, none of the dialog is spoken in a way that would have been accurate for the 9th century. I took a LOT of creative liberties with real history. For example...
- The real Ribe cathedral is only the size of a chapel (not a sprawling fortress like in the game).
- The real Hrotsvitha did not look like a smoking hot librarian, nor could she speak all languages fluently.
- The real Hjortvad and Skov locations in Denmark are laughably nothing like in the game.
- Jelling is a hell of a lot farther North from Ribe than the game depicts.
- There are templars. There is no reason that templars would be wandering around Denmark a century before their establishment in Jerusalem.
And many more things I have twisted around just for the lulz.