I Am Bi-accented (almost!)
I'm from the South, of course I say, "Ya'll"
Plus I add a few syllables to single syllable words too - sometimes!
But, I can turn off the accent and the extra syllabled words - but that "ya'll" likes to sneak out every once in awhile when I am in "mixed company"
Definition of "mixed company": a Southern person talking to a Yankee (aaaaaaaahhhhh - just kidding, my Daddy's a Yankee! LOL)