What do you call someone that speaks three languages? Tri-lingual
What do you call someone that speaks two languages? Bi-lingual
What do you call someone that speaks one language? An American.
I have always loved watching the (ugly) American in another country. Talk slow and loud and that will make them understand. And then there is the (ugly) American at home. make fun of anyone from another country because their English is not up to your standards. Many immigrants speak Engrish (yes I spelled it that way on purpose) as a second or maybe third language. And we make fun of them. But English is an easy language, right?
/rant