Quenya is the Elvish language J.R.R. Tolkien created with a strong influence from Finnish.
Tolkien was a professional philologist, and he designed languages as part of the underlying structure of his fictional histories. Quenya, also called High-elven or High-elvish, was associated with the Ñoldor and other Elves of high cultural status. Its sound patterns and grammatical ideas reflect Tolkien’s interest in Finnish, Latin, and Greek, among other languages.
Sindarin is another major Elvish language in Tolkien’s legendarium, but Tolkien developed it with a different linguistic inspiration, especially Welsh. Quenya often appears in formal names, poetry, royal titles, and ceremonial phrases. The name of Galadriel, Artanis, has a Quenya form, and many well-known Elvish names draw on Tolkien’s carefully constructed vocabulary.
Tolkien did not invent only one Elvish language. He developed related and historically changing languages, giving Middle-earth the feel of a real linguistic family. Quenya is therefore best identified as a language, not simply a writing system or a generic term for Elvish speech.