1º_ It is synonymous with polyglot ("who speaks several languages"), although it is also used as its feminine. 2º_ It is a way of calling the Bible that is printed in more than one language. By extension, any text in several languages.
Person who is fluent in several languages. You know the reading, writing and grammar of several languages.
Who knows several languages that he knows how to write and speak, etc.
person who has a very good intelligence