| mnx | | Manikion | E,
E,
Mantion | 48 |
| mpb | | Malak-Malak | A,
Northern Daly | 76 |
| mpc | | Mangarayi | A,
G,
Mangarayic | 48 |
| mpt | | Mian | T,
O,
O,
Mountain | 395 |
| mql | | Mbelimbe | N,
A,
V,
N,
G,
C,
N,
O,
Eastern | 48 |
| mri | | Maori | A,
M,
C,
E,
O,
C,
R,
C,
E,
P,
N,
E,
C,
Tahitic | 48 |
| mso | | Mombum | T,
Mombum | 48 |
| mte | | Mono | A,
M,
C,
E,
O,
W,
M,
N,
S,
Mono-Uruava | 48 |
| mtj | | Moskona | E,
E,
Meax | 76 |
| mwt | | Moken | A,
M,
Moklen | 120 |
| mzm | | Mumuye (Zing Dialect) | N,
A,
V,
N,
A,
A,
L,
M,
Mumuye | 48 |
| nux | | Mehek | S,
Tama | 36 |
| plt | | Malagasy, plateau | A,
M,
G,
E,
Malagasy | 110 |
| pmy | | Malay (Papua Dialect) | Austronesian | 48 |
| sim | | Mende | S,
Nukuma | 48 |
| skf | | Mekens-ICR-LB | A,
N,
T,
Tupian | 48 |
| skf | | Mekens_ICR_TCC | | 48 |
| skf | | Mekens-ICR-WB | | 48 |
| SKF | | Mekens-ICR-RH | t,
t,
n,
akuntsu-mekens | 48 |
| ulk | | Meriam | Eastern Trans-Fly | 48 |
| unr | | Mundari_ICR_TCC | A,
M,
N,
K,
Mundari | 48 |
| unr | | Mundari-ICR-LB | H,
M,
K,
N,
M,
Austroasiatic | 48 |
| unr | | Mundari-ICR-KQ | A,
M,
N,
K,
M,
Ho-Mundari | 48 |
| vma | | Martuthunira | A,
P,
W,
N,
S,
Pilbara | 54 |
| wpc | | Maco | | 48 |
| wtm | | Mewati | I,
I,
I,
C,
Unclassified | 48 |
| xmm | | Malay (Manado Dialect) | Austronesian | 48 |
| xxm | | Minkin | A,
Tangkic | 0 |
| yan | | Mayangna | M,
S,
Sumuic | 0 |
| ymk | | Makwe | N,
A,
V,
B,
B,
S,
N,
C,
G,
Swahili (G.402) | 48 |
| zlm | | Malay | A,
M,
M,
M,
Malay | 48 |
| zmr | | Maranunggu | A,
Western Daly | 76 |
| zmu | | Muruwari | A,
P,
S,
New South Wales | 76 |
| | Malay (Alor Dialect) | Austronesian | 48 |
