| mans1260 | Mansim | Hatam-Mansim | 12 |
| zrs | nucl1594 | Mairasi | Mairasic | 40 |
| wii | mini1253 | Minidien | N,
W,
C,
Wapeic | 42 |
| wax | wata1253 | Marangis | R,
L,
O,
Watam-Kaian | 65 |
| ulk | meri1244 | Meriam | Eastern Trans-Fly | 0 |
| tsx | muba1238 | Mubami | A,
I,
West Inland Gulf of Papua | 206 |
| tqu | touo1238 | Mbaniata | Central Solomons | 242 |
| slz | maya1282 | Ma'ya | A,
M,
E,
S,
R,
M,
Raja Ampat Maya | 22 |
| sks | maia1254 | Maia (Saki Dialect) | N,
M,
C,
G,
N,
Kaukombaran | 357 |
| sks | maia1254 | Maia (Pila Dialect) | N,
M,
C,
G,
N,
Kaukombaran | 361 |
| skc | sauk1252 | Ma Manda | N,
F,
F,
E,
Sauk-Nimi | 53 |
| sim | mend1268 | Mende | S,
N,
Kwanga-Mende | 46 |
| pla | mian1254 | Miani | N,
M,
C,
G,
N,
Kaukombaran | 341 |
| ped | mala1494 | Mala | N,
M,
C,
G,
N,
Kaukombaran | 347 |
| nux | mehe1243 | Mehek | S,
S,
Mehek-Pahi | 45 |
| mze | mora1273 | Morawa | Mailuan | 56 |
| mxn | moii1235 | Moi | W,
Seget-Moi | 61 |
| mvr | mara1397 | Marau | A,
M,
E,
S,
C,
Y,
C,
Ansus-Ambai | 18 |
| mvq | moer1240 | Moere | N,
M,
C,
G,
N,
K,
Kumil | 304 |
| mtj | mosk1236 | Moskona | E,
Meax | 38 |
| mtj | mosk1236 | Moskona (Merdey Dialect) | E,
Meax | 40 |
| mti | maiw1251 | Maiwa | D,
Central Dagan | 247 |
| mth | mung1269 | Munggui | A,
M,
E,
S,
C,
Y,
C,
Central Yapen | 39 |
| mtf | muri1260 | Murik (Wagamut Dialect) | L,
Nor | 88 |
| mtf | muri1260 | Murik (Karau Dialect) | L,
Nor | 107 |
| mtf | muri1260 | Murik | L,
Nor | 144 |
| mtc | muni1257 | Munit | N,
M,
C,
M,
Kokon | 379 |
| msz | moma1243 | Momare | N,
F,
H,
E,
T,
H,
Sopac | 55 |
| 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 | nucl1622 | Marind | A,
M,
Marindic | 40 |
| mrz | gawi1240 | Marind (Gawir Dialect) | A,
M,
M,
M,
Coastal Marind | 52 |
| 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 |
| 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 |
| 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 (Kemandoga Dialect) | N,
Paniai Lakes | 71 |
| mnz | moni1261 | Moni | N,
Paniai Lakes | 43 |
| mnx | mani1235 | Manikion | East Bird's Head | 42 |
| mmq | musa1266 | Musak | N,
M,
K,
S,
S,
E,
Aisian | 343 |
| mmi | musa1265 | Musar | N,
M,
C,
G,
N,
K,
T,
Nuclear Tibor | 343 |
