Pre-Corellian

Pre-Corellian was a language mentioned in Ben Burtt's Galactic Phrase Book & Travel Guide. Little is actually said of this language beyond it being an ancient pre-Corellian language from which the most universal intergalactic greeting comes. This greeting is yaa-yaah, literally translated as greetings. The book says this phrase is follow by slightly extending your right hand with the palm opened downward. The opposite is the equally ancient haa-yaah, literally translated as farewell. The same hand gesture is used, but this time with the head bowed slightly.

Intrestingly Ugnaughts take the hand gesture as an insult. So the book advises bowing slightly in place of the hand gesture.