Quenya is the Tolkien language associated with the Elves of Valinor and strongly influenced by Finnish.
Tolkien developed Quenya as one of the major Elvish languages in his legendarium. Its history within the fiction connects it with the Ñoldor and other Elves who lived in the West, especially in Valinor. In later Middle-earth, Quenya became a language of learning, ceremony, and high culture rather than the everyday speech of most Elves.
Tolkien’s study of languages shaped his creative method. He did not merely invent vocabulary; he designed sound patterns, grammar, historical change, and relationships between languages. Finnish influenced Quenya’s sound and structure, while Welsh was an important influence on Sindarin.
Quenya and Sindarin are therefore related but distinct. Sindarin became the more commonly spoken Elvish language in much of the Third Age. Khuzdul belongs to the Dwarves, and Black Speech was created for the servants of Mordor.