Quenya was the J.R.R. Tolkien language inspired partly by Finnish.
Tolkien admired the structure and sound of Finnish, and Finnish influence is especially associated with his development of Quenya. He did not merely invent isolated words; he built interconnected languages with sound patterns, grammar, vocabulary, and historical relationships. This approach reflected his professional interest in the evolution of real languages.
In Tolkien’s fictional history, Quenya developed from an earlier language and became associated with the Ñoldor and other high Elves. Sindarin, by contrast, drew strongly on Welsh and served a different role in the linguistic history of Middle-earth. The two names are easy to confuse because both are Elvish languages, but they are not alternate names for the same tongue.