Vaasi is one of the seven major dialects of western men, and the language of the Vaas people of northern Corwyn.

The language is commonly spoken by the peoples of Derianor, Erindar, the Wildlands, and northern Elyria. Vaasi is a diverse language with seventeen different dialects.

Vaasi is also the language of the Wildfolk of the Highlands region, although it is not used by them as a written language.