LOL Since I am a complete mix of Irish,English,Welsh,and German you can only imagine what comes out of my mouth. Y’all and youse is very common to hear here.
For anyone interested in the Scotch-Irish contribution to Appalachian English, I recommend two papers by Michael Montgomery of the University of South Carolina:
1. The Roots of Appalachian English: Scotch-Irish or Southern British? (Appalachian Studies Conference, 1990).
2. How Scotch-Irish Is Your English? The Ulster Heritage of East Tennessee Speech (Journal of East Tennessee History 1995).
I have hard copies of these but they are probably still available on-line.