I’m not the first to say it: here in Kentucky we say y’all. And I grew up near Pittsburgh, and there they say yinz. Funnily enough, I’ve adopted y’all, and you (or all y’all) will never catch me saying yinz, except in jest. I grew up saying you guys (as in “Wait up, you guys!” whined at my older brothers and cousins).
There is a whole survey associated with this, and other maps for what people call “soda”, “shotgun”, “u-turns” and so forth. Of course they can’t use those words in the questions, so they end up being pretty humorous. Probably the most famous thing to come out of UWM.