| 155644 | Migabac | gberiʔ | | | McElhanon and Voorhoeve (1970) | new |
| 218353 | Migabac | qelicne | | | SIL (1975) | |
| 144468 | Miani | yom | | | Z'graggen (1980) | (new) |
| 155642 | Mesem | alak | | | McElhanon and Voorhoeve (1970) | new |
| 91120 | Mesem | gorəŋ | new | | McElhanon (1967) | new |
| 4818 | Menya | hanga | | | Lloyd (1973) | |
| 290 | Mena | wasiạ konau | | | Franklin (1973) | |
| 76439 | Mbilua (Ndovele Dialect) | vairu | new | | Tryon & Hackman (1983) | |
| 76638 | Mbilua | vairu-ama | new | | Tryon & Hackman (1983) | |
| 76830 | Mbaniata (Lokuru Dialect) | avorota | new | | Tryon & Hackman (1983) | |
| 76977 | Mbaniata | avorota | new | | Tryon & Hackman (1983) | |
| 125672 | Mawan | yar | | | Z'graggen (1980) | new |
| 125671 | Mawan | roug | | | Z'graggen (1980) | new |
| 144473 | Mawak | nomuŋ | | | Z'graggen (1980) | (new) |
| 144469 | Mauwake | enuma | | | Z'graggen (1980) | green, new |
| 125674 | Matepi | yor | | | Z'graggen (1980) | new |
| 259108 | Maria | (ˈyaua)ˈruʔai | | | Dutton (1970) | new (house) |
| 259106 | Maria (Uderi Dialect) | (ˈyava)rˈuʔa | | | Dutton (1970) | new (house) |
| 259104 | Maria (Maranomu Dialect) | (ˈyava)ˈruʔa | | | Dutton (1970) | new (house) |
| 259102 | Maria (Maiagolo Dialect) | (ˈyava)rˈuʔa | | | Dutton (1970) | new (house) |
| 155651 | Mape (West Dialect) | gariʔ | | | McElhanon and Voorhoeve (1970) | new |
| 155650 | Mape (Naga Dialect) | gariʔ | | | McElhanon and Voorhoeve (1970) | new |
| 155652 | Mape (East Dialect) | gariʔ | | | McElhanon and Voorhoeve (1970) | new |
| 91126 | Mape | gbâine | new | | McElhanon (1967) | new |
| 29509 | Manem | bogar | | | Voorhoeve (1971) | |
| 155565 | Mandobo Atas | are | | | McElhanon and Voorhoeve (1970) | new |
| 155620 | Ma Manda | koda | | | McElhanon and Voorhoeve (1970) | new |
| 155615 | Mamaa | ait | | | McElhanon and Voorhoeve (1970) | new |
| 233289 | Mali (Makunga Dialect) | aⁱǥʌřuǥa | | | SIL (1985) | |
| 233175 | Mali (Arambum Dialect) | iǥuřuǥa | | | SIL (1985) | |
| 181547 | Male | kasGʌi | | | Z'graggen (1980) | new |
| 144461 | Malas | tamen | | | Z'graggen (1980) | (new) |
| 144465 | Mala | ŋɛm | | | Z'graggen (1980) | (new) |
| 221311 | Maiwa | matʰaiwa | | | SIL (1973) | |
| 86711 | Mailu (Island Dialect) | gadara | | | Thomson (1975) | |
| 86437 | Mailu (Ilai Dialect) | gadara | | | Thomson (1975) | |
| 87807 | Mailu (Geagea Dialect) | gadara | | | Thomson (1975) | |
| 87259 | Mailu (Domara Dialect) | gadara | | | Thomson (1975) | |
| 88081 | Mailu (Delebai Dialect) | gadara | | | Thomson (1975) | |
| 88355 | Mailu (Darava Dialect) | gadara | | | Thomson (1975) | |
| 86985 | Mailu (Borebo Dialect) | gadara | | | Thomson (1975) | |
| 87533 | Mailu (Baibara Dialect) | gadara | | | Thomson (1975) | |
| 86163 | Mailu (Asiaoro Dialect) | gadara | | | Thomson (1975) | |
| 144467 | Maia (Saki Dialect) | toromo | | | Z'graggen (1980) | (new) |
| 144466 | Maia (Pila Dialect) | toromo | | | Z'graggen (1980) | (new) |
| 257115 | Magɨ | arɨm? | | | Daniels (2016) | |
| 155590 | Madi | ger̃ŋʌŋ | | | McElhanon and Voorhoeve (1970) | new |
| 181531 | Lemio | ɔᵬə | | | Z'graggen (1980) | new |
| 165085 | Lembena (Yariba Dialect) | wɛ'nɛŋk͑ | | | Davies and Comrie (1985) | new |
| 165079 | Lembena (Maibi Dialect) | wɛ'nɛŋk͑ | | | Davies and Comrie (1985) | new |
