Quenya is the Elvish language that J.R.R. Tolkien developed most fully for The Lord of the Rings and his wider legendarium.
Tolkien based Quenya’s sound and structure partly on languages such as Finnish, while also giving it its own history and vocabulary. In his fictional history, it was associated especially with the High Elves and with the Elves of Valinor.
Quenya is not the only Elvish language in Tolkien’s work. Sindarin is another major Elvish language and appears frequently in the stories, especially among the Elves of Middle-earth. The two languages have related fictional histories but are distinct systems.
Tolkien worked on his languages throughout his life, and many details survive in drafts, notes, and posthumously edited publications. Consequently, the languages are richly developed but not always complete in the way a modern everyday language is.