An endangered language is a language that it is at risk of falling out of use, generally because it has few surviving speakers. If it loses all of its native speakers, it becomes an extinct language. UNESCO defines four levels of language endangerment between "safe" (not endangered) and "extinct":[1]
| Language | Speakers | Status | Comments | Ref |
|---|---|---|---|---|
| Abaga language | Critically endangered | |||
| Ainbai language | Severely endangered | |||
| Ak language | Severely endangered | |||
| Anuki language | Definitely endangered | |||
| Arawun language | Severely endangered | |||
| Ari language | Severely endangered | |||
| Atemble language | Definitely endangered | |||
| Bagupi language | Definitely endangered | |||
| Bepour language | Severely endangered | |||
| Bikaru language | Severely endangered | |||
| Bilakura language | Critically endangered | |||
| Bosilewa language | Vulnerable | |||
| Bothar language | Severely endangered | |||
| Budibud language | Vulnerable | |||
| Bukiyip language | Vulnerable | |||
| Bulgebi language | Definitely endangered | |||
| Bumbita Arapesh language | Vulnerable | |||
| Dengalu language | Definitely endangered | |||
| Doga language | Definitely endangered | |||
| Dorro language | Severely endangered | |||
| Dumun language | Critically endangered | |||
| Duwet language | Vulnerable | |||
| Faita language | Severely endangered | |||
| Garuwahi language | Definitely endangered | |||
| Gorovu language | Severely endangered | |||
| Grass Koiari language | Vulnerable | |||
| Guranalum language | Critically endangered | |||
| Hermit language | Critically endangered | |||
| Iteri language | Severely endangered | |||
| Kaiep language | Vulnerable | |||
| Kaki Ae language | Vulnerable | |||
| Kalamo language | Severely endangered | |||
| Kamasa language | Critically endangered | |||
| Kandas language | Vulnerable | |||
| Kaningara language | Vulnerable | |||
| Karore language | Vulnerable | |||
| Kawucha language | Critically endangered | |||
| Koitabu language | Vulnerable | |||
| Kowaki language | Critically endangered | |||
| Kuot language | Vulnerable | |||
| Laua language | Critically endangered | |||
| Laxudumau language | Vulnerable | |||
| Likum language Likum | Definitely endangered | |||
| Magori language | Vulnerable | |||
| Makolkol language | Critically endangered | |||
| Mari language | Severely endangered | |||
| Mawak language | Critically endangered | |||
| Mindiri language | Severely endangered | |||
| Moere language | Severely endangered | |||
| Mosimo language | Severely endangered | |||
| Murik language | Vulnerable | |||
| Musan language | Severely endangered | |||
| Musom language | Definitely endangered | |||
| Mussau-Emira language | Definitely endangered | |||
| Mwatebu language | Definitely endangered | |||
| Nafi language | Severely endangered | |||
| Nauna language | Vulnerable | |||
| Numbami language | Vulnerable | |||
| Onjab language | Vulnerable | |||
| Ouma language | Critically endangered | |||
| Papapana language | Definitely endangered | |||
| Papi language | Severely endangered | |||
| Piame language | Severely endangered | |||
| Piu language | Definitely endangered | |||
| Puari language | Critically endangered | |||
| Samosa language | Severely endangered | |||
| Sene language | Critically endangered | |||
| Sengseng language | Vulnerable | |||
| Sepa language, Schouten languages | Vulnerable | |||
| Sera language, | Severely endangered | |||
| Sissano language | Critically endangered | |||
| Somm language | Definitely endangered | |||
| Suarmin language | Definitely endangered | |||
| Sumariup language | Severely endangered | |||
| Susuami language | Critically endangered | |||
| Taap language | Critically endangered | |||
| Taiap language | Severely endangered | |||
| Taulil language | Vulnerable | |||
| Tench language | Critically endangered | |||
| Turaka language | Critically endangered | |||
| Usu language | Severely endangered | |||
| Vehes language | Severely endangered | |||
| Wab language | Vulnerable | |||
| Warapu language | Severely endangered | |||
| Yapunda language | Severely endangered | |||
| Yarawata language | Severely endangered | |||
| Yarawi language | Critically endangered | |||
| Yimas language | Severely endangered | |||