| 20247 | Mai Brat | mti | | | Voorhoeve (1975) | |
| 75164 | Mailu | garu | | | Saville (1912) | |
| 86089 | Mailu (Asiaoro Dialect) | garu | | | Thomson (1975) | |
| 87459 | Mailu (Baibara Dialect) | garu | | | Thomson (1975) | |
| 86911 | Mailu (Borebo Dialect) | garu | | | Thomson (1975) | |
| 88281 | Mailu (Darava Dialect) | garu | | | Thomson (1975) | |
| 88007 | Mailu (Delebai Dialect) | garu | | | Thomson (1975) | |
| 87185 | Mailu (Domara Dialect) | garu | | | Thomson (1975) | |
| 87733 | Mailu (Geagea Dialect) | garu | | | Thomson (1975) | |
| 86363 | Mailu (Ilai Dialect) | garu | | | Thomson (1975) | |
| 86637 | Mailu (Island Dialect) | garu | | | Thomson (1975) | |
| 21565 | Mairasi | wei-jemi | | | Voorhoeve (1975) | |
| 221294 | Maiwa | a'ram | | | SIL (1973) | |
| 56169 | Makasae | (O) dedem | | | Stokhof (1975) | |
| 56170 | Makasae | wanat | | | Stokhof (1975) | |
| 21205 | Maklew | wi | | | Voorhoeve (1975) | |
| 145010 | Mala | orod | | | Z'graggen (1980) | night |
| 145006 | Malas | pune | | | Z'graggen (1980) | night |
| 182028 | Male | kuluigen | | | Z'graggen (1980) | night |
| 233164 | Mali (Arambum Dialect) | bʌŋnŋgi | | | SIL (1985) | |
| 233278 | Mali (Makunga Dialect) | bʌŋaŋki | | | SIL (1985) | |
| 22817 | Mander | korin | | | Voorhoeve (1975) | |
| 25555 | Mandobo Atas | wemin | | | Voorhoeve (1975) | |
| 231439 | Mandobo Atas | wemin | | | Healey (1970) | |
| 231623 | Mandobo Atas (Kwem Dialect) | wamin | | | Healey (1970) | |
| 29510 | Manem | süomp | | | Voorhoeve (1971) | |
| 19195 | Manem | süomp | | | Voorhoeve (1975) | |
| 20447 | Manikion | roba | | | Voorhoeve (1975) | |
| 90762 | Mape | uwu | night | | McElhanon (1967) | night |
| 258087 | Maria (Maiagolo Dialect) | uˈrunio | | | Dutton (1970) | night |
| 258091 | Maria (Maranomu Dialect) | ˈuruni | | | Dutton (1970) | night |
| 258090 | Maria (Maranomu Dialect) | ˈuruha | | | Dutton (1970) | night |
| 258093 | Maria (Uderi Dialect) | ˈuruha | | | Dutton (1970) | night |
| 258095 | Maria | ˈurufa | | | Dutton (1970) | night |
| 22327 | Marind | hap | | | Voorhoeve (1975) | |
| 21926 | Marind, Bian | xa:p | | | Voorhoeve (1975) | |
| 126259 | Matepi | tupʌna | | | Z'graggen (1980) | night |
| 145015 | Mauwake | ur̃ʌ | | | Z'graggen (1980) | night |
| 145019 | Mawak | turerek | | | Z'graggen (1980) | night |
| 145020 | Mawak | hatru | | | Z'graggen (1980) | night |
| 126256 | Mawan | abuia | | | Z'graggen (1980) | night |
| 25755 | Mawes | kotrau | | | Voorhoeve (1975) | |
| 77912 | Maybrat | mti | | | Dol (2007) | |
| 76993 | Mbaniata | hiu | night | | Tryon & Hackman (1983) | |
| 76826 | Mbaniata (Lokuru Dialect) | hiu | night | | Tryon & Hackman (1983) | |
| 76451 | Mbilua | ipu | night | | Tryon & Hackman (1983) | |
| 76375 | Mbilua (Ndovele Dialect) | ipu | night | | Tryon & Hackman (1983) | |
| 25875 | Mekwei | wansiŋ | | | Voorhoeve (1975) | |
| 259 | Mena | kʌꝑo·n(u) | | | Franklin (1973) | |
| 4787 | Menya | haatɨqa | | | Lloyd (1973) | |
