Finn: Where's the wayfinder?
C-3PO: I am afraid I cannot tell you.
Poe Dameron: 20.3 fazillion languages, you can't read that?
C-3PO: Oh, I have read it, sir. I know exactly where the wayfinder is. Unfortunately, it is written in the runic language of the Sith.
Rey: So what?
C-3PO: My programming forbids me from translating it.
Poe Dameron: So, you're telling us the one time we need you to talk, you can't?
C-3PO: Irony, sir. I am mechanically incapable of speaking translations from Sith.