| mpv | mung1272 | Mungkip | N,
F,
F,
E,
Boana | 165 |
| mpt | mian1256 | Mian | N,
A,
A,
O,
O,
M,
Mianic | 130 |
| kti | nort2916 | Muyu, North | N,
A,
A,
O,
O,
L,
Division A Lowland Ok | 102 |
| kts | sout2940 | Muyu, South | N,
A,
A,
O,
O,
L,
Division A Lowland Ok | 100 |
| aax | mand1444 | Mandobo Atas (Yonggom Dialect) | N,
A,
A,
G,
A,
D,
Mandobo | 82 |
| aax | mand1444 | Mandobo Atas | N,
A,
A,
G,
A,
D,
Mandobo | 367 |
| aax | mand1444 | Mandobo Atas (Kwem Dialect) | N,
A,
A,
G,
A,
D,
Mandobo | 184 |
| wii | mini1253 | Minidien | N,
W,
C,
Wapeic | 42 |
| kja | mlap1238 | Mlap | N,
O,
Mlap-Gresi-Kemtuik | 40 |
| msf | mekw1241 | Mekwei | N,
Outer Nimboranic | 41 |
| mle | mana1298 | Manambu | N,
N,
Manambu-Yalaku | 43 |
| mso | nucl1452 | Mombum | Mombum-Koneraw | 48 |
| ayz | maib1239 | Mai Brat | Maybrat | 41 |
| 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 |
| zrs | nucl1594 | Mairasi | Mairasic | 40 |
| mgu | baib1249 | Mailu (Baibara Dialect) | M,
Mailu | 273 |
| mgu | bore1246 | Mailu (Borebo Dialect) | M,
Mailu | 273 |
| mgu | dara1252 | Mailu (Darava Dialect) | M,
Mailu | 273 |
| mgu | dere1243 | Mailu (Delebai Dialect) | M,
Mailu | 273 |
| mgu | geag1239 | Mailu (Geagea Dialect) | M,
Mailu | 273 |
| mgu | ilai1239 | Mailu (Ilai Dialect) | M,
Mailu | 273 |
| mgu | isla1273 | Mailu (Island Dialect) | M,
Mailu | 273 |
| mgu | doma1262 | Mailu (Domara Dialect) | M,
Mailu | 273 |
| mgu | asia1264 | Mailu (Asiaoro Dialect) | M,
Mailu | 273 |
| mgu | mail1248 | Mailu | Mailuan | 243 |
| mze | mora1273 | Morawa | Mailuan | 56 |
| mtf | muri1260 | Murik (Karau Dialect) | L,
Nor | 107 |
| mtf | muri1260 | Murik (Wagamut Dialect) | L,
Nor | 88 |
| mtf | muri1260 | Murik | L,
Nor | 144 |
| akc | mpur1239 | Mpur (Arfu Dialect) | Language isolate | 40 |
| akc | mpur1239 | Mpur (Kebar Dialect) | Language isolate | 52 |
| akc | mpur1239 | Mpur | Language isolate | 82 |
| mfw | mula1254 | Mulaha | Kwalean | 150 |
| kpx | moun1252 | Mountain Koiari | K,
K,
Biage-Mountain Koiali | 185 |
| mdb | mori1271 | Morigi | K,
Turama-Kerewo | 99 |
| mans1260 | Mansim | Hatam-Mansim | 12 |
| ulk | meri1244 | Meriam | Eastern Trans-Fly | 0 |
| mtj | mosk1236 | Moskona | E,
Meax | 38 |
| mej | meya1236 | Meyah (Mumbrani Dialect) | E,
Meax | 41 |
| mej | meya1236 | Meyah (Etskebi Dialect) | E,
Meax | 39 |
| mej | meya1236 | Meyah (Miun Dialect) | E,
Meax | 40 |
| mtj | mosk1236 | Moskona (Merdey Dialect) | E,
Meax | 40 |
| mej | meya1236 | Meyah (Akrin Dialect) | E,
Meax | 40 |
| mej | meya1236 | Meyah | E,
Meax | 39 |
| mej | meya1236 | Meyah (Anason Dialect) | E,
Meax | 40 |
| mnx | mani1235 | Manikion | East Bird's Head | 42 |
| mti | maiw1251 | Maiwa | D,
Central Dagan | 247 |
