[t-writescode]

English does not have a distinct, second-person plural. There are several regional attempts to make one.

Y’all is the Southern second-person plural, a contraction of ‘you all’ (you, second-person; all, suggesting more than one)

[omosubi]

this is becoming common in the rest of the US as well because of the lack of second person plural. they call it y'all sprawl. I hear it frequently here in Chicago.