Board Thread:Episode Discussions/@comment-3125844-20140418203039/@comment-24397663-20140507130639

hmm, if he really wanted to pronunce it the german way, he can use that R, that's not the point, but he would use another pronounciation of the U. And the 'dt' should be much sharper. He would have said sthg like the german word 'Burg' (for castle)... its hard to explaine... more like... Book? A short spoken O. So more like "Boorkhart"

After hearing it again and again for some time, I think it's more likely some eastern european accent. But definitly not german...