I don't beleive we are the default. I would be the same the other way round. There is a guy at our club who mainly does American songs but he does them in the most cringingly bad American accent. It simply spoils the performance and it isn't necessary.

Neither do I think Scottish people would get angry if someone did a song in a mock Scottish accent! Simply pointing out that many people (of course there are exceptions)who mimic a Scottish accent go way over the top and it comes out sounding an awful parody. I only suggested that singing the words as written without overtly mimicking the accent itself is in my opinion generally better. Personally i find non-English speakers often don't have the problem as they just sing the words straight without the mimicking.

Fair enough an awful parody of a Scottish accent may not be recognised as so depending on where you are - but if I am doing a song from someone else's culture then I'd like to think I could do it to the best of my ability and I'd like to think that they might not find it ridiculous sounding. In other words I'd be interested in their advice and not just accuse them of some kind of superiority complex.