Quote from : Star Wars: Episode VI - Return of the Jedi Movie

EV-9D9: Ah, new acquisitions! You are a protocol droid, are you not?
C-3PO: I am C-3PO, human/cyborg...
EV-9D9: [cuts him off] Yes or no will do.
C-3PO: Umm... yes.
EV-9D9: How many languages do you speak?
C-3PO: I am fluent in over six million forms of communication, and can readily...
EV-9D9: [cuts him off again] Splendid! We have been without an interpreter since our master got angry with our last protocol droid and disintegrated him.
C-3PO: Disintegrated?