In Alabama the plural of "y'all" is "all y'all."
LOL !
I’ve never been quite clear on that. Does that mean you can use “y’all” when addressing a single person? If so, it’s no improvement at all in terms of clarity over just plain “you”. I don’t know, off hand, if any language has a pronoun or word ending (for agultinative languages like Hungarian) than distinguishes between addressing a single person and a group.
Well, I just checked with my Hungarian co-worker and, yes, there is a clear difference between addressing a single person and a group.
It is, here, too - “all y’all” implies “your momma and them.”