Dang, Mordred is UNWORTHY unworthy huh?

@ Author's Note: Sure, but then Mordred wouldn't be able to understand, and he's in a position where he benefits from being heard by Mordred, even if Mordred isn't paying attention to him, as it reveals that Wiglaf was ignorant of the potential burning. Thus his primary character trait (can't give more details due to spoilers) means he has to speak in a language Mordred understands as a direct result of that benefit.

From memory, we never saw Wiglaf use Swedish in situations where it would be arguably beneficial for Mordred to understand him, after all.

...I had to delete and repost this in order to edit it to include "@ Author's Note".