| 87180 | Mailu (Domara Dialect) | ligoni | | | Thomson (1975) | |
| 87728 | Mailu (Geagea Dialect) | visiu | | | Thomson (1975) | |
| 86358 | Mailu (Ilai Dialect) | visiu | | | Thomson (1975) | |
| 86632 | Mailu (Island Dialect) | visiu | | | Thomson (1975) | |
| 221221 | Maiwa | bu'.anae | | | SIL (1973) | |
| 217818 | Maiwa | marantun | Daga - buanae | | SIL (1967) | |
| 56174 | Makasae | bɛrɛ (O) ihi | | | Stokhof (1975) | |
| 56173 | Makasae | 'fi | | | Stokhof (1975) | |
| 143178 | Mala | kay | | | Z'graggen (1980) | star |
| 143174 | Malas | umbut | | | Z'graggen (1980) | star |
| 180228 | Male | br̃aŋar̃ | | | Z'graggen (1980) | star |
| 233127 | Mali (Arambum Dialect) | ga'ŋ | | | SIL (1985) | |
| 233229 | Mali (Makunga Dialect) | alinka | | | SIL (1985) | |
| 157018 | Mamaa | dɔbɔk | | | McElhanon and Voorhoeve (1970) | star |
| 157023 | Ma Manda | fʌbugum | | | McElhanon and Voorhoeve (1970) | star |
| 156963 | Mandobo Atas | minap | | | McElhanon and Voorhoeve (1970) | star |
| 29525 | Manem | manman | | | Voorhoeve (1971) | |
| 90818 | Mape | bâpiŋ | star | | McElhanon (1967) | star |
| 157055 | Mape (East Dialect) | bɔuŋ | | | McElhanon and Voorhoeve (1970) | star |
| 157053 | Mape (Naga Dialect) | bɔboŋ | | | McElhanon and Voorhoeve (1970) | star |
| 157054 | Mape (West Dialect) | bɔuŋ | | | McElhanon and Voorhoeve (1970) | star |
| 236741 | Marangis | gwi | | | Foley (2005) | |
| 258021 | Maria (Maiagolo Dialect) | ˈiamana | | | Dutton (1970) | star |
| 258023 | Maria (Maranomu Dialect) | ˈia | | | Dutton (1970) | star |
| 258025 | Maria (Uderi Dialect) | ˈiamana | | | Dutton (1970) | star |
| 258027 | Maria | ˈiama | | | Dutton (1970) | star |
| 124216 | Matepi | fal | | | Z'graggen (1980) | star |
| 143183 | Mauwake | mokomʌ | | | Z'graggen (1980) | star |
| 143187 | Mawak | meŋgam | | | Z'graggen (1980) | star |
| 124214 | Mawan | far | | | Z'graggen (1980) | star |
| 77847 | Maybrat | sken | | | Dol (2007) | |
| 76914 | Mbaniata | finofino | star | | Tryon & Hackman (1983) | |
| 76847 | Mbaniata (Lokuru Dialect) | finɔfinɔ | star | | Tryon & Hackman (1983) | |
| 76562 | Mbilua | suti | star | | Tryon & Hackman (1983) | |
| 76357 | Mbilua (Ndovele Dialect) | suti | star | | Tryon & Hackman (1983) | |
| 236740 | Mbore | gwi | | | Foley (2005) | |
| 243851 | Mehek | ware | | | Laycock (1968) | |
| 256 | Mena | sɨgwin | | | Franklin (1973) | |
| 243860 | Mende | tašiŋkra | | | Laycock (1968) | |
| 4784 | Menya | qataqweqa | | | Lloyd (1973) | |
| 157045 | Mesem | dzʌmʌrindzʌŋ | | | McElhanon and Voorhoeve (1970) | star |
| 90812 | Mesem | dzəmərindzə | star | | McElhanon (1967) | star |
| 156969 | Mian | awitrin | | | McElhanon and Voorhoeve (1970) | star |
| 143182 | Miani | mʌgʌ | | | Z'graggen (1980) | star |
| 218251 | Migabac | bopiŋ | | | SIL (1975) | |
| 157047 | Migabac | asoɔmeŋ | | | McElhanon and Voorhoeve (1970) | star |
| 218271 | Migabac | hasoemeŋ | | | SIL (1975) | |
| 180206 | Migum | buai | | | Z'graggen (1980) | star |
| 3053 | Minanibai | gugi | | | Franklin (1973) | |
| 243839 | Minidien | neputen | | | Laycock (1968) | |
