| mgu | baib1249 | Mailu (Baibara Dialect) | M,
Mailu | 273 |
| mgu | geag1239 | Mailu (Geagea Dialect) | M,
Mailu | 273 |
| mgu | asia1264 | Mailu (Asiaoro Dialect) | M,
Mailu | 273 |
| mgu | isla1273 | Mailu (Island Dialect) | M,
Mailu | 273 |
| mgu | ilai1239 | Mailu (Ilai Dialect) | M,
Mailu | 273 |
| mgu | doma1262 | Mailu (Domara Dialect) | M,
Mailu | 273 |
| mgu | dere1243 | Mailu (Delebai Dialect) | M,
Mailu | 273 |
| mgu | bore1246 | Mailu (Borebo Dialect) | M,
Mailu | 273 |
| mhf | mama1277 | Mamaa | N,
F,
F,
E,
Finungwan-Mamaa-Gusan | 55 |
| mhl | mauw1238 | Mauwake | N,
M,
C,
G,
N,
K,
Kumil | 341 |
| mhz | morm1235 | Mor (Austronesian) | A,
M,
E,
South Halmahera-West New Guinea | 52 |
| mjj | mawa1266 | Mawak | N,
M,
C,
G,
N,
K,
T,
Nuclear Tibor | 346 |
| mkr | mala1495 | Manep | N,
M,
C,
G,
N,
Manep-Barem | 20 |
| mkr | mala1495 | Malas | N,
M,
C,
G,
N,
Manep-Barem | 328 |
| mkz | maka1316 | Makasae | T,
East Timor | 100 |
| mle | mana1298 | Manambu | N,
N,
Manambu-Yalaku | 43 |
| mlh | mape1249 | Mape (West Dialect) | N,
F,
H,
E,
T,
H,
Kate-Mape | 53 |
| mlh | mape1249 | Mape (East Dialect) | N,
F,
H,
E,
T,
H,
Kate-Mape | 48 |
| mlh | niga1243 | Mape (Naga Dialect) | N,
F,
H,
E,
T,
H,
K,
Mape | 54 |
| mlh | mape1249 | Mape | N,
F,
H,
E,
T,
H,
Kate-Mape | 140 |
| mmi | musa1265 | Musar | N,
M,
C,
G,
N,
K,
T,
Nuclear Tibor | 343 |
| mmq | musa1266 | Musak | N,
M,
K,
S,
S,
E,
Aisian | 343 |
| mnx | mani1235 | Manikion | East Bird's Head | 42 |
| mnz | moni1261 | Moni | N,
Paniai Lakes | 43 |
| mnz | moni1261 | Moni (Kemandoga Dialect) | N,
Paniai Lakes | 71 |
| mok | moro1289 | Morori | T,
Moraori | 40 |
| moq | morb1239 | Mor | T,
Mor | 40 |
| mpp | miga1241 | Migabac | N,
F,
H,
E,
T,
H,
Sopac | 238 |
| mpt | mian1256 | Mian | N,
A,
A,
O,
O,
M,
Mianic | 130 |
| mpv | mung1272 | Mungkip | N,
F,
F,
E,
Boana | 165 |
| mqe | mate1260 | Matepi | N,
M,
C,
M,
H,
Unclassified Hanseman | 360 |
| mqf | momu1241 | Momuna | Somahai | 34 |
| mqr | mand1443 | Mander | T,
Tor | 37 |
| mqv | mosi1248 | Mosimo | N,
M,
C,
M,
H,
Wamas-Samosa-Murupi-Mosimo | 355 |
| mqw | muru1273 | Murupi | N,
M,
C,
M,
H,
Wamas-Samosa-Murupi-Mosimo | 382 |
| mrz | nucl1622 | Marind | A,
M,
Marindic | 40 |
| mrz | gawi1240 | Marind (Gawir Dialect) | A,
M,
M,
M,
Coastal Marind | 52 |
| msf | mekw1241 | Mekwei | N,
Outer Nimboranic | 41 |
| msg | mora1239 | Moraid | W,
South West Bird's Head | 37 |
| msl | molo1262 | Molof | Unclassified | 118 |
| mso | nucl1452 | Mombum | Mombum-Koneraw | 48 |
| msx | more1258 | Moresada | N,
M,
K,
S,
O,
P,
Anamuxric | 329 |
| msz | moma1243 | Momare | N,
F,
H,
E,
T,
H,
Sopac | 55 |
| mtc | muni1257 | Munit | N,
M,
C,
M,
Kokon | 379 |
| mtf | muri1260 | Murik (Karau Dialect) | L,
Nor | 107 |
| mtf | muri1260 | Murik | L,
Nor | 144 |
| mtf | muri1260 | Murik (Wagamut Dialect) | L,
Nor | 88 |
| mth | mung1269 | Munggui | A,
M,
E,
S,
C,
Y,
C,
Central Yapen | 39 |
| mti | maiw1251 | Maiwa | D,
Central Dagan | 247 |
| mtj | mosk1236 | Moskona (Merdey Dialect) | E,
Meax | 40 |
