Quenya is the Elvish language created by J.R.R. Tolkien that is associated with the High Elves.
Tolkien developed Quenya as part of his extensive work on the languages and histories of Middle-earth. Its sounds and structure were influenced especially by Finnish, and Tolkien treated it as a language with grammar, vocabulary, historical development, and related dialects rather than as a simple collection of invented words.
In Tolkien's fictional history, Quenya was connected with the Elves of Valinor and was later used in formal, literary, and ceremonial contexts in Middle-earth. Sindarin, another major Elvish language, became more widely spoken among many Elves in Middle-earth. The two are therefore related but not interchangeable.
Modern readers often identify any Tolkien Elvish speech as Quenya, but that is too broad. Texts such as the names of important figures and places may come from Quenya, Sindarin, or another language, so the specific linguistic context matters.