| mtf | muri1260 | Murik | L,
Nor | 144 |
| mtf | muri1260 | Murik (Karau Dialect) | L,
Nor | 107 |
| mtf | muri1260 | Murik (Wagamut Dialect) | L,
Nor | 88 |
| mtc | muni1257 | Munit | N,
M,
C,
M,
Kokon | 379 |
| msz | moma1243 | Momare | N,
F,
H,
E,
T,
H,
Sopac | 55 |
| msy | arua1260 | Aruamu | R,
L,
R,
Mikarewan | 64 |
| msx | more1258 | Moresada | N,
M,
K,
S,
O,
P,
Anamuxric | 329 |
| mso | nucl1452 | Mombum | Mombum-Koneraw | 48 |
| msl | molo1262 | Molof | Unclassified | 118 |
| msg | mora1239 | Moraid | W,
South West Bird's Head | 37 |
| msf | mekw1241 | Mekwei | N,
Outer Nimboranic | 41 |
| mrz | gawi1240 | Marind (Gawir Dialect) | A,
M,
M,
M,
Coastal Marind | 52 |
| mrz | nucl1622 | Marind | A,
M,
Marindic | 40 |
| mrx | mare1261 | Dineor | T,
Tor | 7 |
| mrf | else1239 | Elseng | Language isolate | 134 |
| mqw | muru1273 | Murupi | N,
M,
C,
M,
H,
Wamas-Samosa-Murupi-Mosimo | 382 |
| mqv | mosi1248 | Mosimo | N,
M,
C,
M,
H,
Wamas-Samosa-Murupi-Mosimo | 355 |
| mqs | west2600 | West Makian | W,
N,
West Makian | 257 |
| mqr | mand1443 | Mander | T,
Tor | 37 |
| mqf | momu1241 | Momuna | Somahai | 34 |
| mqe | mate1260 | Matepi | N,
M,
C,
M,
H,
Unclassified Hanseman | 360 |
| mpv | mung1272 | Mungkip | N,
F,
F,
E,
Boana | 165 |
| mpt | mian1256 | Mian | N,
A,
A,
O,
O,
M,
Mianic | 130 |
| mps | dadi1250 | Dadibi | Teberan | 102 |
| mpp | miga1241 | Migabac | N,
F,
H,
E,
T,
H,
Sopac | 238 |
| moq | morb1239 | Mor | T,
Mor | 40 |
| mok | moro1289 | Morori | T,
Moraori | 40 |
| mnz | moni1261 | Moni | N,
Paniai Lakes | 43 |
| mnz | moni1261 | Moni (Kemandoga Dialect) | N,
Paniai Lakes | 71 |
| mnx | mani1235 | Manikion | East Bird's Head | 42 |
| mmq | musa1266 | Musak | N,
M,
K,
S,
S,
E,
Aisian | 343 |
| mmp | siaw1243 | Siawi | Amto-Musan | 101 |
| mmi | musa1265 | Musar | N,
M,
C,
G,
N,
K,
T,
Nuclear Tibor | 343 |
| mlp | barg1252 | Bargam | N,
M,
Croisilles | 379 |
| mlh | mape1249 | Mape (West Dialect) | N,
F,
H,
E,
T,
H,
Kate-Mape | 53 |
| 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 |
| mlh | mape1249 | Mape (East Dialect) | N,
F,
H,
E,
T,
H,
Kate-Mape | 48 |
| mle | mana1298 | Manambu | N,
N,
Manambu-Yalaku | 43 |
| mkz | maka1316 | Makasae | T,
East Timor | 100 |
| mkr | mala1495 | Manep | N,
M,
C,
G,
N,
Manep-Barem | 20 |
| mkr | mala1495 | Malas | N,
M,
C,
G,
N,
Manep-Barem | 328 |
| mkc | sili1247 | Siliput | T,
M,
Maimai Proper | 44 |
| mjj | mawa1266 | Mawak | N,
M,
C,
G,
N,
K,
T,
Nuclear Tibor | 346 |
| miw | akoy1238 | Akoye | A,
N,
A,
Tainae-Akoye | 105 |
| mhz | morm1235 | Mor (Austronesian) | A,
M,
E,
South Halmahera-West New Guinea | 52 |
| mhl | mauw1238 | Mauwake | N,
M,
C,
G,
N,
K,
Kumil | 341 |
| mhf | mama1277 | Mamaa | N,
F,
F,
E,
Finungwan-Mamaa-Gusan | 55 |
| mgu | mail1248 | Mailu | Mailuan | 243 |
| mgu | dere1243 | Mailu (Delebai Dialect) | M,
Mailu | 273 |
