(1) One who can speak or write several languages. (2) Having or using several languages.
Example:
As trade between countries increases, there is more need for polyglots who can act as negotiators.
Polyglot contains the root glot, meaning "language." It is used both as a noun and as an adjective. An international airport is bound to be a polyglot, with people from all over the world speaking their native languages. One of history's more intriguing polyglots was the Holy Roman Emperor Charles V. He claimed that he addressed his horse only in German, he conversed with women in Italian and with men in French, but he reserved Spanish for his talks with God.