Yeah, I took notice of that during my recent replay.
Too: "Pirate Lingo! It's how everybody talked back then. Come on Guybrush, play along." It struck me as weirdly eerie as opposed to being a throwaway joke. It certainly foreshadows the theme park, and how does he know Guybrush's name?
None of which has to have anything to do with the secret, of course, but it's not outside the realm of possibility either.