Wasu (Waçu, Wassú) is an extinct and unattested, presumed language of the Serra do Azul in Joaquim Gomes, Alagoas, Brazil. The ethnic population is about 1,500.

References

Further reading Fabre, Alain (2005): "Wassú" (Diccionario etnolingüístico y guía bibliográfica de los pueblos indígenas sudamericanos.)