Quenya is the fictional language J.R.R. Tolkien created with strong influence from Finnish and used for the people of Valinor. It is one of the major Elvish languages in his legendarium.
Tolkien began developing Quenya before The Lord of the Rings and connected it with the high Elves, especially the Noldor. Its sound patterns and grammar reflect his lifelong interest in historical linguistics and in the structure of real languages.
Quenya is not the same as Sindarin, another major Elvish language that became more commonly spoken in Middle-earth during the later ages. Khuzdul belongs to the Dwarves, while Black Speech was devised for the servants of Mordor. Tolkien’s languages are fictional, but he developed them with extensive linguistic detail.