Should answers like "Are you all/ya'll the bosses here?" be accepted? English sort of has 2nd Per. Pl.
"sorta" is the word. I don't think it should accept dialectal slang as many students are not native English speakers and could be misled. Outside of the US it is not accepted. (Here in NZ we have "yous" which is used for comedic effect or if you want to portray a character as a total moron - not something for new English learners to pick up!)