Quenya is the Tolkien language associated with Finnish language and Finnish mythology.
Tolkien began developing Quenya during the 1910s, drawing inspiration from Finnish as well as Latin and Greek. He designed it as an Elvish language with an extensive sound system, grammar, and vocabulary rather than as a small collection of invented words.
Within Tolkien’s mythology, Quenya was associated especially with the High Elves, including the Noldor. It appears in names, poetry, formal speech, and inscriptions across The Lord of the Rings and The Silmarillion.
Quenya is often confused with Sindarin, another major Elvish language. Sindarin became the commonly spoken Elvish language of many Elves in Middle-earth and was influenced partly by Welsh, while Quenya served a more formal and historical role in much of the legendarium.