Quenya is the fictional language created by J.R.R. Tolkien that was chiefly inspired by Finnish.
Tolkien developed Quenya, also called High-elven, as one of the major languages of his legendarium. Its sound and grammar were influenced especially by Finnish, while its vocabulary and history were shaped within Tolkien's invented mythology. Quenya is associated primarily with the Ñoldor and other Elves of high culture.
Tolkien was a professional philologist, so his invented languages were designed with historical relationships, sound changes, and grammatical structures rather than as collections of decorative words. Quenya therefore exists alongside related languages, including Sindarin, which became more commonly spoken in much of Middle-earth.
The language is sometimes confused with Sindarin because both are Elvish languages used in The Lord of the Rings. Sindarin drew strong inspiration from Welsh, whereas Quenya's most frequently cited real-world linguistic influence is Finnish. Tolkien also drew on Latin and other languages in developing his linguistic systems.