| 29852 | Kuni-Boazi | měnɑs | | | Voorhoeve (1970) | |
| 165843 | Kuot | narain | | | Lindström (2008) | |
| 24959 | Kurudu | boru | | | Voorhoeve (1975) | |
| 22544 | Kwerba | inic | | | Voorhoeve (1975) | |
| 22628 | Kwerba (Airmati Dialect) | nenemuan | | | Voorhoeve (1975) | |
| 23113 | Kwerisa | teia | | | Voorhoeve (1975) | |
| 22909 | Kwesten | nauar | | | Voorhoeve (1975) | |
| 244645 | Kwoma | uprus | | | Laycock (1968) | |
| 164086 | Kyaka | lama | | | Davies and Comrie (1985) | two |
| 164085 | Kyenele (Kyaimbarang Dialect) | aɽawi | | | Davies and Comrie (1985) | two |
| 164092 | Kyenele (Miyak Dialect) | aǏawin | | | Davies and Comrie (1985) | two |
| 22992 | Lau | bobararidi | | | Voorhoeve (1975) | |
| 76250 | Lavukaleve | lelal | two | | Tryon & Hackman (1983) | |
| 76071 | Lavukaleve | lemal | two | | Tryon & Hackman (1983) | |
| 164090 | Lembena | lamana | | | Davies and Comrie (1985) | two |
| 164091 | Lembena (Maibi Dialect) | ɽa'man | | | Davies and Comrie (1985) | two |
| 164099 | Lembena (Yariba Dialect) | 'ɽaman | | | Davies and Comrie (1985) | two |
| 180946 | Lemio | ʌr̃ki | | | Z'graggen (1980) | two |
| 256973 | Magɨ | agrenda | | | Daniels (2016) | |
| 143903 | Maia (Pila Dialect) | ŋier | | | Z'graggen (1980) | (two) |
| 143904 | Maia (Saki Dialect) | iŋɛr | | | Z'graggen (1980) | (two) |
| 21151 | Mai Brat | eyok | | | Voorhoeve (1975) | |
| 21150 | Mai Brat | ewok | | | Voorhoeve (1975) | |
| 75197 | Mailu | ava | | | Saville (1912) | |
| 86264 | Mailu (Asiaoro Dialect) | ʔava | | | Thomson (1975) | |
| 87634 | Mailu (Baibara Dialect) | ʔava | | | Thomson (1975) | |
| 87086 | Mailu (Borebo Dialect) | ʔava | | | Thomson (1975) | |
| 88456 | Mailu (Darava Dialect) | ʔava | | | Thomson (1975) | |
| 88182 | Mailu (Delebai Dialect) | ʔava | | | Thomson (1975) | |
| 87360 | Mailu (Domara Dialect) | ʔava | | | Thomson (1975) | |
| 87908 | Mailu (Geagea Dialect) | ʔava | | | Thomson (1975) | |
| 86538 | Mailu (Ilai Dialect) | ʔava | | | Thomson (1975) | |
| 86812 | Mailu (Island Dialect) | ʔava | | | Thomson (1975) | |
| 21577 | Mairasi | amoi | | | Voorhoeve (1975) | |
| 217833 | Maiwa | dúam | | | SIL (1967) | |
| 221235 | Maiwa | du:ʌm | | | SIL (1973) | |
| 21217 | Maklew | inage | | | Voorhoeve (1975) | |
| 143902 | Mala | ŋier̃ | | | Z'graggen (1980) | (two) |
| 143898 | Malas | arɛr | | | Z'graggen (1980) | (two) |
| 180963 | Male | liko | | | Z'graggen (1980) | two |
| 233139 | Mali (Arambum Dialect) | udion | | | SIL (1985) | |
| 233243 | Mali (Makunga Dialect) | aᵘⁿdom | | | SIL (1985) | |
| 22829 | Mander | nauwet | | | Voorhoeve (1975) | |
| 201396 | Mandobo Atas | rumo | | | Voorhoeve (2000) | |
| 231402 | Mandobo Atas | rumo | | | Healey (1970) | |
| 25567 | Mandobo Atas | rumo | | | Voorhoeve (1975) | |
| 231585 | Mandobo Atas (Kwem Dialect) | rumo | | | Healey (1970) | |
| 201478 | Mandobo Atas (Yonggom Dialect) | irumo | | | Voorhoeve (2000) | |
| 29532 | Manem | sampaŋ | | | Voorhoeve (1971) | |
| 19207 | Manem | sampaŋ | | | Voorhoeve (1975) | |
