J.R.R. Tolkien based Quenya partly on Finnish and associated it with the High Elves.
Quenya is one of Tolkien’s major constructed languages in the legends of Middle-earth. He developed its sound and grammar as part of a broader mythology, not merely as a list of words for his novels.
Tolkien drew inspiration from several real languages. Finnish strongly influenced Quenya, while Welsh was an important influence on the sound of Sindarin. Quenya is often presented as an ancient, formal language of the Elves, and its use resembles a learned or ceremonial tongue within the fictional history.
Quenya and Sindarin are sometimes mixed up because both are Elvish languages. Sindarin became the more commonly spoken Elvish language in much of Middle-earth during the period portrayed in The Lord of the Rings.