Sindarin is the fictional language associated with many Elves of Beleriand in J.R.R. Tolkien’s works.
Tolkien based much of Sindarin’s sound and historical development on Welsh, while placing it within a larger family of Elvish languages. In the First Age, Sindarin became the everyday language of many Sindar, or Grey Elves, in Beleriand. It remained widely used in Middle-earth during later ages.
Sindarin and Quenya are often confused because both are major Elvish languages. Quenya is associated especially with the High Elves and has a more formal or ancient status, while Sindarin became a common spoken language among many Elves in Middle-earth.
Names such as Galadriel, Celeborn, and Minas Tirith reflect Tolkien’s constructed-language work, although individual names can have complex histories. Sindarin demonstrates how Tolkien built not just vocabulary but language families, sound changes, and imagined cultural histories.