My birds don't speak English, but they have their own language; at least they have multi purpose words.
WeeOugh! is a greeting and the response is usually Wheet!
Quiel! is usually a cry of alarm.
Whree! is usually what they say when they want out of their cage when I or my family comes home.
If Pavi wants to get my attention she says Tserwi! which is also what Caso calls Patty. It either means "friend" or "love".
Whurp!? is usually meaning "what are you doing and why?"
These are just some of the words I notice they use, but they also have a few which writing would do no justice, usually used in their songs which they sing to each other as well as songs for when the sun first comes out. (such as in the morning or after a bad storm is over.)
Ben