| 50666 | Maori | maatou | | | Harlow (1996) | |
| 25120 | Mara | ṇirwiña | | | Heath (1981) | |
| 24440 | Maranunggu | ŋaca | | | Tryon (1970) | |
| 61936 | Martuthunira | nganarna | | | Dench (1995) | |
| 33572 | Mauwake | (y)i | | | Berghäll (2010) | |
| 39411 | Mauwake | (y)i | | | Berghäll (2010) | |
| 48662 | Mavea | kam̋im | | | Guérin (2011) | |
| 57000 | Mayogo | ya | | | Sawka (2001) | |
| 56484 | Mbato | lo˥ | | | Grassias and Bolé-Richard (1983) | |
| 58436 | Mbelimbe | ti˧ | | | Neukom (2004) | |
| 24104 | Mblafe | nəndʒe | | | Doehler, Christian () | |
| 43999 | Mbugu (Inner Dialect) | níne, nne | | | Mous (2003) | |
| 44047 | Mbugu (Normal Dialect) | úswi | | | Mous (2003) | |
| 41680 | Mehek | numbra | | | Paulon et al. (2002) | |
| 60070 | Mekens-ICR-LB | ose | | | Galucio (2001) | |
| 60824 | Mekens-ICR-RH | ose | | | Vilacy (2001) | |
| 60440 | Mekens_ICR_TCC | ose | | | Galucio (2001) | |
| 60214 | Mekens-ICR-WB | ose | | | Vilacy Galucio, Ana. 2001 () | |
| 41362 | Mende | nir | | | Hoel et al. (1994) | |
| 35383 | Menya | ne | | | Whitehead (2004) | |
| 42658 | Meriam | ki | | | Piper (1989) | |
| 50858 | Mewati | həm | | | Gusain (2003) | |
| 40297 | Meyah | memef | | | Gravelle (2004) | |
| 30657 | Mian | ní | | | Fedden (2007) | |
| 30659 | Mian | níli | | | Fedden (2007) | |
| 30658 | Mian | ní- | | | Fedden (2007) | |
| 39776 | Mian | ní | | | Fedden (2007) | |
| 43903 | Modern Hebrew | anˈaxnu | | | Glinert (1989) | |
| 31075 | Moken | kamoy | | | Veena (1980) | |
| 31076 | Moken | ʔetaʔ | | | Veena (1980) | |
| 46678 | Mombum | num | | | Boelaars (1950) | |
| 48854 | Mongolian (Halh Dialect) | bid | | | Gaunt and Bayarmandakh (2004) | |
| 50054 | Mono | mani | | | Evans (2015) | |
| 45822 | Morisyen | nuzot | | | Baker (1972) | |
| 43650 | Moroccan Arabic | ħna | | | Harrell (1962) | |
| 35111 | Moskona | mif | | | Gravelle (2010) | |
| 60920 | Mpakwithi | ɲaŋa | | | Dixon (1981) | |
| 61823 | Mpur | yek | | | Odé (2002) | |
| 40666 | Mufian | afé' | | | Conrad et al. (1978) | |
| 52566 | Muinane | mɨ́ɨ́ʔai | | | Walton, Hensarling and Maxwell (2000) | |
| 57144 | Mumuye (Zing Dialect) | wò | | | Shimizu (1983) | |
| 34708 | Muna | insaidi | | | van den Berg (1989) | |
| 60310 | Mundari-ICR-KQ | ale | | | Osada (1992) | |
| 60022 | Mundari-ICR-LB | abu | | | Osada (1992) | |
| 60458 | Mundari_ICR_TCC | ale | | | Osada (1992) | |
| 59199 | Mungbam (Abar Dialect) | sɔ˧ | | | Lovegren (2013) | |
| 59245 | Mungbam (Biya Dialect) | sə˧ | | | Lovegren (2013) | |
| 59292 | Mungbam (Missong Dialect) | sə˧ | | | Lovegren (2013) | |
| 59141 | Mungbam (Munken Dialect) | sə˧ | | | Lovegren (2013) | |
| 59340 | Mungbam (Ngun Dialect) | sə˧ | | | Lovegren (2013) | |
