Quenya is the constructed language of J.R.R. Tolkien associated with the High Elves.
Tolkien developed Quenya from his lifelong interest in historical linguistics, especially Finnish, Latin, and Greek. Within his fictional history, Quenya was the ancient language of the Elves of Valinor and remained a prestigious, literary language among many Elves in Middle-earth.
Quenya is not the same as Sindarin, although both are Elvish languages created by Tolkien. Sindarin became the more commonly spoken Elven language in much of Middle-earth during the Third Age, while Quenya often carried formal, ceremonial, or historical associations. Names such as Eärendil and phrases such as “Namárië” belong to Tolkien's Elvish linguistic world.
Tolkien created vocabulary, grammar, sound patterns, and historical changes for his languages rather than merely inventing isolated words. His language-making often came first: he famously described stories as growing around languages. The surviving material is extensive, but Quenya is not a complete everyday language in the modern sense.