[sionnsar]

If you don't say "Y'all" what do you say?

As a Southerner moved North (a very long time ago), "You all." (pn "yewal.")

Interestingly, though, I've come across this lack of distinction between the 2nd person singular and plural in several languages, not just (modern) English.

[4CJ]

Interestingly, though, I've come across this lack of distinction between the 2nd person singular and plural in several languages...

Having it does make understanding Latin much easier, as do the 'thee' and 'thou' in old English in the King James version of the Bible.