The fictional language spoken by the Valar in Tolkien’s mythology is Valarin.
Valarin is the language of the Valar, the powerful spiritual beings who inhabit Tolkien’s world. In the mythology of The Silmarillion, the Valar are Ainur who entered the world of Arda and helped shape it. Their speech is described as difficult for the Elves to hear and reproduce, and only a small number of Valarin words are recorded in Tolkien’s writings.
Valarin should not be confused with Quenya or Sindarin. Quenya is the classical Elvish language associated especially with the Ñoldor, while Sindarin became the everyday Elvish language of many Elves in Middle-earth. Tolkien designed these languages with historical relationships, sound changes, and vocabulary rather than treating them as simple collections of invented words.
The surviving information about Valarin is limited, making it a specialized subject within Tolkien’s linguistic world. Its name comes from the Valar themselves.