| mgu | ilai1239 | Mailu (Ilai Dialect) | M,
Mailu | 273 |
| mti | maiw1251 | Maiwa | D,
Central Dagan | 247 |
| mkz | maka1316 | Makasae | T,
East Timor | 100 |
| aup | maka1315 | Makayam | A,
T,
Nuclear Tirio | 0 |
| ped | mala1494 | Mala | N,
M,
C,
G,
N,
Kaukombaran | 347 |
| mkr | mala1495 | Malas | N,
M,
C,
G,
N,
Manep-Barem | 328 |
| mdc | male1291 | Male | N,
M,
R,
M,
L,
Inland Minjim | 320 |
| mhf | mama1277 | Mamaa | N,
F,
F,
E,
Finungwan-Mamaa-Gusan | 55 |
| skc | sauk1252 | Ma Manda | N,
F,
F,
E,
Sauk-Nimi | 53 |
| payn1244 | Manat | N,
M,
K,
S,
S,
A,
Greater West Sogeram | 46 |
| aax | mand1444 | Mandobo Atas (Kwem Dialect) | N,
A,
A,
G,
A,
D,
Mandobo | 184 |
| aax | mand1444 | Mandobo Atas | N,
A,
A,
G,
A,
D,
Mandobo | 367 |
| aax | mand1444 | Mandobo Atas (Yonggom Dialect) | N,
A,
A,
G,
A,
D,
Mandobo | 82 |
| mkr | mala1495 | Manep | N,
M,
C,
G,
N,
Manep-Barem | 20 |
| mlh | mape1249 | Mape (West Dialect) | N,
F,
H,
E,
T,
H,
Kate-Mape | 53 |
| mlh | mape1249 | Mape | N,
F,
H,
E,
T,
H,
Kate-Mape | 140 |
| mlh | niga1243 | Mape (Naga Dialect) | N,
F,
H,
E,
T,
H,
K,
Mape | 54 |
| mlh | mape1249 | Mape (East Dialect) | N,
F,
H,
E,
T,
H,
Kate-Mape | 48 |
| mds | uder1239 | Maria (Uderi Dialect) | M,
Maria (Papua New Guinea) | 179 |
| mds | mari1438 | Maria | Manubaran | 195 |
| mds | mari1438 | Maria (Maiagolo Dialect) | Manubaran | 264 |
| mds | mari1438 | Maria (Maranomu Dialect) | Manubaran | 272 |
| mrz | gawi1240 | Marind (Gawir Dialect) | A,
M,
M,
M,
Coastal Marind | 52 |
| mrz | nucl1622 | Marind | A,
M,
Marindic | 40 |
| bpv | bian1251 | Marind, Bian | A,
M,
Marindic | 42 |
| mqe | mate1260 | Matepi | N,
M,
C,
M,
H,
Unclassified Hanseman | 360 |
| mhl | mauw1238 | Mauwake | N,
M,
C,
G,
N,
K,
Kumil | 341 |
| mjj | mawa1266 | Mawak | N,
M,
C,
G,
N,
K,
T,
Nuclear Tibor | 346 |
| mcz | mawa1267 | Mawan | N,
M,
C,
M,
H,
Silopic | 363 |
| meb | mena1240 | Mena | T,
T,
Ikobi | 111 |
| mcr | meny1245 | Menya | A,
N,
Kapau-Menya | 103 |
| mci | mese1244 | Mesem | N,
F,
H,
W,
R,
Sankwep | 192 |
| mpt | mian1256 | Mian | N,
A,
A,
O,
O,
M,
Mianic | 130 |
| pla | mian1254 | Miani | N,
M,
C,
G,
N,
Kaukombaran | 341 |
| mpp | miga1241 | Migabac | N,
F,
H,
E,
T,
H,
Sopac | 238 |
| klm | kolo1267 | Migum | N,
M,
R,
Kabenau | 300 |
| mcv | mina1274 | Minanibai | A,
I,
West Inland Gulf of Papua | 99 |
| mvq | moer1240 | Moere | N,
M,
C,
G,
N,
K,
Kumil | 304 |
| msz | moma1243 | Momare | N,
F,
H,
E,
T,
H,
Sopac | 55 |
| mso | nucl1452 | Mombum | Mombum-Koneraw | 48 |
| mnz | moni1261 | Moni | N,
Paniai Lakes | 43 |
| mnz | moni1261 | Moni (Kemandoga Dialect) | N,
Paniai Lakes | 71 |
| moq | morb1239 | Mor | T,
Mor | 40 |
| mze | mora1273 | Morawa | Mailuan | 56 |
| msx | more1258 | Moresada | N,
M,
K,
S,
O,
P,
Anamuxric | 329 |
| mdb | mori1271 | Morigi | K,
Turama-Kerewo | 99 |
| mok | moro1289 | Morori | T,
Moraori | 40 |
| mqv | mosi1248 | Mosimo | N,
M,
C,
M,
H,
Wamas-Samosa-Murupi-Mosimo | 355 |
| kpx | moun1252 | Mountain Koiari | K,
K,
Biage-Mountain Koiali | 185 |
| tsx | muba1238 | Mubami | A,
I,
West Inland Gulf of Papua | 206 |
