Finnish is in a totally different language family than Swedish-Norwegian-Danish. However Viking performs the same result. I am wondering the outcome when using Viking for Hungarian, as it is a near relative to Finnish.

Finnish and Hungarian split apart from their common ancestor in approximate 2200 BC, so they are not very near relatives, just relatives. In any event, over the millennia they lost much of their common vocabulary and were exposed to different contact influences, so performance on one doesn't make a big difference over other languages on its performance on the other.

Viking was trained on Finnish as well, so that's why it gets good results. I ran a quick check on Hungarian, Viking didn't perform well at all(about 2x the tokens of English).