Quenya is the Elvish language J.R.R. Tolkien developed with a structure strongly inspired by Finnish.
Tolkien began developing Quenya before publishing The Hobbit, and he continued changing its vocabulary, grammar, and fictional history throughout his life. In the mythology of Middle-earth, Quenya is associated especially with the High Elves and with the Elves of Valinor.
Sindarin is another major Elvish language, but Tolkien based its sound and development more heavily on Welsh. Khuzdul is the secret language of the Dwarves, while the Black Speech was created for the servants of Sauron. These languages are therefore related to Tolkien’s linguistic invention but are not alternatives to Quenya.
Quenya is sometimes called “High-elven” or “the language of the High Elves.” Its use in names, poetry, and formal speech gives Tolkien’s fictional cultures a deep sense of historical change and linguistic relationship.