Abuʼ Arapesh language
Abu, also known as Ua (meaning 'no'), is an Arapesh language (Torricelli family) of Papua New Guinea. It is dying, as speakers are shifting to Tok Pisin. Otto Nekitel, a first language speaker of Abu' Arapesh, was awarded a PhD from the ANU in 1986 for his thesis Sociolinguistic aspects of Abu, becoming the first Papua New Guinean to receive a doctorate in linguistics. Abu is spoken in:
East Sepik Province: Albiges/Mablep Rural LLG, ward 8 (Wamsak / Amom) ()
Sandaun Province: East Aitape Rural LLG, wards 23, 24, 25 (respectively: Wamsis (), Balup (), Matapau ())

References

External links 
OLAC resources in and about the Abu' Arapesh language

Arapesh languages
Languages of Sandaun Province
Languages of East Sepik Province