Sindarin

Sindarin is the most common language of the Elves in the Third Age. Originally used by the Elves of Doriath in Beleriand, it was picked up by the Noldorin in exile, who started to speak their language, Quenya, only when amongst themselves. After the War of Wrath and the destruction of Beleriand, the remnants of these Elves fled to the kingdoms of their cousins the Sylvan Elves. The Sindarin tongue was quickly adopted and replaced the Sylvan tongue, which now survives mainly in the names of various places.