| 220 | Manikion | Reesink (2002) | |
| 254 | Mansim | Reesink (2002) | Free |
| 441 | Maori | Harlow (1996) | Free |
| 47 | Mara | Heath (1981) | Free |
| 36 | Maranunggu | Tryon (1970) | |
| 105 | Martuthunira | Dench (1995) | Free |
| 689 | Mathi-Mathi | Blake et al. (2011) | |
| 169 | Mauwake | Berghäll (2010) | |
| 214 | Mauwake: clean | Berghäll (2010) | |
| 399 | Mavea | Guérin (2011) | Bound |
| 584 | Mayogo | Sawka (2001) | Free |
| 573 | Mbato | Grassias and Bolé-Richard (1983) | Free |
| 617 | Mbelimbe | Neukom (2004) | Free |
| 30 | Mblafe | Doehler, Christian () | Free |
| 300 | Mbugu (Inner Dialect) | Mous (2003) | Free |
| 301 | Mbugu (Normal Dialect) | Mous (2003) | Free |
| 249 | Mehek | Paulon et al. (2002) | |
| 653 | Mekens-ICR-LB | Galucio (2001) | |
| 668 | Mekens-ICR-RH | Vilacy (2001) | |
| 661 | Mekens_ICR_TCC | Galucio (2001) | |
| 656 | Mekens-ICR-WB | Vilacy Galucio, Ana. 2001 () | |
| 242 | Mende | Hoel et al. (1994) | |
| 195 | Menya | Whitehead (2004) | Free |
| 267 | Meriam | Piper (1989) | |
| 445 | Mewati | Gusain (2003) | Free |
| 219 | Meyah | Gravelle (2004) | |
| 136 | Mian | Fedden (2007) | |
| 216 | Mian: clean | Fedden (2007) | |
| 298 | Modern Hebrew | Glinert (1989) | Free |
| 142 | Moken | Veena (1980) | Free |
| 358 | Mombum | Boelaars (1950) | Free |
| 403 | Mongolian (Halh Dialect) | Gaunt and Bayarmandakh (2004) | Free |
| 428 | Mono | Evans (2015) | Free |
| 339 | Morisyen | Baker (1972) | Free |
| 292 | Moroccan Arabic | Harrell (1962) | |
| 190 | Moskona | Gravelle (2010) | Free |
| 670 | Mpakwithi | Dixon (1981) | |
| 687 | Mpur | Odé (2002) | |
| 227 | Mufian | Conrad et al. (1978) | |
| 485 | Muinane | Walton, Hensarling and Maxwell (2000) | |
| 587 | Mumuye (Zing Dialect) | Shimizu (1983) | Free |
| 184 | Muna | van den Berg (1989) | |
| 658 | Mundari-ICR-KQ | Osada (1992) | |
| 652 | Mundari-ICR-LB | Osada (1992) | |
| 662 | Mundari_ICR_TCC | Osada (1992) | |
| 634 | Mungbam (Abar Dialect) | Lovegren (2013) | Free |
| 635 | Mungbam (Biya Dialect) | Lovegren (2013) | Free |
| 636 | Mungbam (Missong Dialect) | Lovegren (2013) | Free |
| 633 | Mungbam (Munken Dialect) | Lovegren (2013) | Free |
| 637 | Mungbam (Ngun Dialect) | Lovegren (2013) | Free |
