The four Avava-speaking villages speak, or spoke, distinct dialects. Timbembe and Nevaar (Nɨviar) are still spoken. The Nivat (Nevat) and Bangasa (Umbrul) dialects are extinct. Bangasa/Bangsa', or more correctly Bangasak, was known as Numbuwul by its neighbors to the north; the endonym is Umbbuul [(u)ᵐʙuːl].
- Terry Crowley, 2006, The Avava language of central Malakula (Vanuatu)