"Hello, I am C-3PO, human-cyborg relations." C-3PO is a protocol droid, and translation is one of its major functions. From a translator/interpreter's point of view, C-3PO is rather "basic" even though it (or he?) is familiar with over six million forms of communication. It is a robot in place of a human (or some other intelligent life form) translator/interpreter. It still lacks skills in recognising human emotions. For example, in The Empire Strikes Back (1980), when Han Solo was kissing Princess Leia, it walked in untimely. A human butler would have waited and avoided causing embarrassment.
Interestingly, it does show some human traits, like being fussy... Is that one of the GPP features? You know, genuine people personalities.
"We seem to be made to suffer. It's our lot in life."
Well, at least I never complained about having to meet people at the airport or hotel and take them to some other place. "Here I am, brain the size of a planet, and they tell me to take you up to the bridge. Call that job satisfaction, 'cos I don't." This is not C-3PO.