| 58407 | Mbelimbe | di˩ | | | Neukom (2004) | |
| 24133 | Mblafe | ɸɪ | | | Doehler, Christian () | |
| 41658 | Mehek | osa | | | Paulon et al. (2002) | |
| 60041 | Mekens-ICR-LB | i-, s- | | | Galucio (2001) | |
| 60795 | Mekens-ICR-RH | sete, te | | | Vilacy (2001) | |
| 60411 | Mekens_ICR_TCC | te | | | Galucio (2001) | |
| 60185 | Mekens-ICR-WB | te | | | Vilacy Galucio, Ana. 2001 () | |
| 41333 | Mende | sir | | | Hoel et al. (1994) | |
| 35416 | Menya | ki | | | Whitehead (2004) | |
| 42629 | Meriam | e | | | Piper (1989) | |
| 50829 | Mewati | ja | | | Gusain (2003) | |
| 40268 | Meyah | ofa | | | Gravelle (2004) | |
| 30748 | Mian | é- | | | Fedden (2007) | |
| 39868 | Mian | ó | | | Fedden (2007) | |
| 30747 | Mian | é | | | Fedden (2007) | |
| 30750 | Mian | ó- | | | Fedden (2007) | |
| 30749 | Mian | ó | | | Fedden (2007) | |
| 43874 | Modern Hebrew | hi | | | Glinert (1989) | |
| 31142 | Moken | ʔolaaŋ | | | Veena (1980) | |
| 31141 | Moken | ñaa | | | Veena (1980) | |
| 46649 | Mombum | aːŋɡib | | | Boelaars (1950) | |
| 48825 | Mongolian (Halh Dialect) | tɛr | | | Gaunt and Bayarmandakh (2004) | |
| 50025 | Mono | ∅ | | | Evans (2015) | |
| 45793 | Morisyen | li | | | Baker (1972) | |
| 43621 | Moroccan Arabic | huwa | | | Harrell (1962) | |
| 35144 | Moskona | ofa | | | Gravelle (2010) | |
| 60891 | Mpakwithi | ŋyun̪u | | | Dixon (1981) | |
| 61794 | Mpur | men | | | Odé (2002) | |
| 40637 | Mufian | éko'w | | | Conrad et al. (1978) | |
| 52537 | Muinane | díígo | | | Walton, Hensarling and Maxwell (2000) | |
| 57115 | Mumuye (Zing Dialect) | wu | | | Shimizu (1983) | |
| 34750 | Muna | anoa | | | van den Berg (1989) | |
| 60281 | Mundari-ICR-KQ | ay | | | Osada (1992) | |
| 59993 | Mundari-ICR-LB | ay | | | Osada (1992) | |
| 60470 | Mundari_ICR_TCC | ay | | | Osada (1992) | |
| 59169 | Mungbam (Abar Dialect) | wu˦, u˦ | | | Lovegren (2013) | |
| 59216 | Mungbam (Biya Dialect) | wu˦, u˦ | | | Lovegren (2013) | |
| 59263 | Mungbam (Missong Dialect) | wu˦, u˦ | | | Lovegren (2013) | |
| 59112 | Mungbam (Munken Dialect) | wu˦, u˦ | | | Lovegren (2013) | |
| 59311 | Mungbam (Ngun Dialect) | ɥə˥ | | | Lovegren (2013) | |
| 53716 | Murui Huitoto | naiɲaiɲo | | | Piñeros and Roselli (2000) | |
| 25492 | Muruwari | nhumpa, nhampu | | | Oates (1988) | |
| 47877 | Mussau-Emira | e= | | | Lynch et al. (2002) | |
| 47867 | Mussau-Emira | ia | | | Lynch et al. (2002) | |
| 30435 | Nabak | ek | | | Fabian et al. (1998) | |
| 53381 | Nadëb | ta- | | | Bolaños and Epps (2009) | |
| 59601 | Nama | ɸæ | | | Evans et al (2017) | |
| 22326 | Nambu | bä | | | Evans (2013) | |
| 41697 | Namia | eko | | | Feldpausch and Feldpausch (1992) | |
| 59697 | Namo (Tais Dialect) | fæ | | | Evans et al (2017) | |
