What is a Polyglot? A polyglot is a person who speaks many different languages. There have been many such famous people over the years. One who's name is Joseph Caspar Mezzofanti, was an italian Cardinal, and lived in the 18th and 19th centuries. He claimed to be able to speak over 38 different languages! And people from all over the world would come to challenge him in their native tongues, and he never ceased to amaze them with his fluency.
You can read about the life of Cardinal Mezzofanti in The Life Of Cardinal Mezzofanti by Charles William Russell. There is a copy of this in the LB bookstore.
And check out this list of languages that Mezzofanti was able to speak! It's HUGE! It indicates how well he could speak all of the languages; OVER 30 languages, perfectly! You've got to check this guy out if you're a lanugage enthusiast.