I have a recording somewhere of Adge Cutler singing Rock & Roll in his Somerset accent..

Ooh Arrh, thisen nothin' but a hedgehog!
Get off moi brown suede gaitors!

I have spent many years in business and more recently having to have a degree of credibility in Whitehall. As a result, not by trying but naturally, my South Yorkshire / Derbyshire accent and dialect has disappeared. yet when I sing local songs, it comes back with knobs on.

Again, not by trying, just happens, that's all.

Mind you, if singing an American song, it does get all mid Atlantic if I am being honest.