I am really impressed that whoever did the voice acting for that one Greybeard almost correctly pronounced the name of Jürgen Windcaller, even though the game spells it Jurgen.
That the germanic J is pronounced Y is easy enough to explain, but they must have had a native German or Swedish speaker to coach all the voice actors who had Nord names in their texts.

But what is it with that Skyrim accent? Some Nords seem to have a very strong and consistent accent, but about half of them don't have it at all. Is that just a screw-up, or are they two different groups in-game that I just havn't figured out yet?