| ayz | maib1239 | Maybrat | W,
Maybrat | 228 |
| blb | bilu1245 | Mbaniata (Lokuru Dialect) | Central Solomons | 205 |
| tqu | touo1238 | Mbaniata | Central Solomons | 242 |
| blb | bilu1245 | Mbilua | Central Solomons | 213 |
| blb | bilu1245 | Mbilua (Ndovele Dialect) | Central Solomons | 195 |
| gai | bore1247 | Mbore | R,
L,
Ottilien | 61 |
| nux | mehe1243 | Mehek | S,
S,
Mehek-Pahi | 45 |
| msf | mekw1241 | Mekwei | N,
Outer Nimboranic | 41 |
| meb | mena1240 | Mena | T,
T,
Ikobi | 111 |
| sim | mend1268 | Mende | S,
N,
Kwanga-Mende | 46 |
| mcr | meny1245 | Menya | A,
N,
Kapau-Menya | 103 |
| ulk | meri1244 | Meriam | Eastern Trans-Fly | 0 |
| mci | mese1244 | Mesem | N,
F,
H,
W,
R,
Sankwep | 192 |
| mej | meya1236 | Meyah (Akrin Dialect) | E,
Meax | 40 |
| mej | meya1236 | Meyah | E,
Meax | 39 |
| mej | meya1236 | Meyah (Mumbrani Dialect) | E,
Meax | 41 |
| mej | meya1236 | Meyah (Etskebi Dialect) | E,
Meax | 39 |
| mej | meya1236 | Meyah (Miun Dialect) | E,
Meax | 40 |
| mej | meya1236 | Meyah (Anason Dialect) | E,
Meax | 40 |
| 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 |
| wii | mini1253 | Minidien | N,
W,
C,
Wapeic | 42 |
| kja | mlap1238 | Mlap | N,
O,
Mlap-Gresi-Kemtuik | 40 |
| mvq | moer1240 | Moere | N,
M,
C,
G,
N,
K,
Kumil | 304 |
| mxn | moii1235 | Moi | W,
Seget-Moi | 61 |
| msl | molo1262 | Molof | Unclassified | 118 |
| msz | moma1243 | Momare | N,
F,
H,
E,
T,
H,
Sopac | 55 |
| mso | nucl1452 | Mombum | Mombum-Koneraw | 48 |
| mqf | momu1241 | Momuna | Somahai | 34 |
| mnz | moni1261 | Moni | N,
Paniai Lakes | 43 |
| mnz | moni1261 | Moni (Kemandoga Dialect) | N,
Paniai Lakes | 71 |
| moq | morb1239 | Mor | T,
Mor | 40 |
| msg | mora1239 | Moraid | W,
South West Bird's Head | 37 |
| mhz | morm1235 | Mor (Austronesian) | A,
M,
E,
South Halmahera-West New Guinea | 52 |
| 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 |
| mtj | mosk1236 | Moskona (Merdey Dialect) | E,
Meax | 40 |
| mtj | mosk1236 | Moskona | E,
Meax | 38 |
| meu | motu1246 | Motu | A,
M,
E,
O,
W,
P,
P,
C,
West Central Papuan linkage | 280 |
| kpx | moun1252 | Mountain Koiari | K,
K,
Biage-Mountain Koiali | 185 |
| akc | mpur1239 | Mpur (Kebar Dialect) | Language isolate | 52 |
| akc | mpur1239 | Mpur | Language isolate | 82 |
| akc | mpur1239 | Mpur (Arfu Dialect) | Language isolate | 40 |
| tsx | muba1238 | Mubami | A,
I,
West Inland Gulf of Papua | 206 |
