Describing someone as a 'linguist' suggests he is one who can unite mankind once more, and free him from oppression. Potentially, he does this through his poetic skill rather than through speaking all the world's languages.
Of course, it's used a bit more lightly than all that...
So, how many languages do you speak?
You should work for the UN. They speak languages.
You mean so you can, like, invent new languages? There's a lot of money in that, you know.
I like reading the dictionary.
So, are you a cunning linguist?
Chomsky. (knowing nod)
Oh, so you know where words come from.
Wanna come work for the CIA with us?