Don & Bob, I wouldn't feel bad about doing songs with dialect, or having done them . You never know who in that audience might have Scots (or Czech or whatever) roots or who might simply fall in love with Scots songs, but has never heard a blasted one sung except for Auld Lang Syne. I stumbled onto some in books and albums literally by mistake and I love them. I too don't like people to put on phony accents, but if you love the song, sing it to people. You could always, in your introduction, ask if anybody in the room was born in Scotland or whatever, and if you get a yes, tell them it's a good time to take a bathroom break 'cause you're about to butcher their language.