sorry, but linguistically and culturally, all of the Icelanders that I've ever known consider themselves Scandinavian, and you're begging for an argument by grouping them separately. Granted, it's nowhere near the response that my younger sister's second grade teacher got from dad when she claimed that Iceland was part of North America, but still... As far as linguistics go, Icelandic is four vowel mutations from most major dialects of the Viking language (y to u, y to ú, and vice versa). That, by the way, is identical to an old form of Norwegian. Throw in a little more than 700 years of it being passed back and forth between Denmark and Norway which took from 1877 to 1944 to terminate, and I think they have a solid argument in favor of Scandinavian status on their hands.
And where do Greenlanders fit in?
Anyway, just my 2 krónur...
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