Mbo, you did not perform the song with no accent - you did it with an overdone caricature of an American accent. Would have loved to hear you do it without any attempt at any accent - it would have sounded fine, I think.

Scots is recognized as a separate language by some. My take on that (excuse) is that one tries to speak a language with a proper accent. If you speak French, do you do so with your own accent, or do you at least try to speak with a French accent?