| yamb1257 | Yamben | T,
M,
Croisilles | 20 |
| yyu | yaus1235 | Yau | T,
W,
Wapei | 46 |
| yva | nucl1454 | Yawa | W,
Yapen | 40 |
| yuw | yaum1237 | Yau (Yawan Dialect) | T,
F,
F,
Uruwa | 51 |
| yuw | yaum1237 | Yau (Sindamon Dialect) | T,
F,
F,
Uruwa | 52 |
| yuw | yaum1237 | Yau (Kumdauron Dialect) | T,
F,
F,
Uruwa | 54 |
| yuw | yaum1237 | Yau (mup Dialect) | T,
F,
F,
Uruwa | 54 |
| yuw | yaum1237 | Yau (Worin Dialect) | T,
F,
F,
Uruwa | 55 |
| yuw | yaum1237 | Yau (Mitmit Dialect) | T,
F,
F,
Uruwa | 52 |
| yut | kewi1240 | Yopno (Kewieng Dialect) | T,
F,
F,
Yupna | 59 |
| yut | noko1240 | Yopno (Nokopo Dialect) | T,
F,
F,
Yupna | 55 |
| yss | yess1239 | Yessan-Mayo (Warasai Dialect) | S,
Tama | 30 |
| yss | yess1239 | Yessan-Mayo | S,
Tama | 88 |
| yrw | yara1250 | Yarawata | T,
M,
C,
P,
Numugenan | 362 |
| yon | yong1280 | Yongkom | T,
O,
O,
Lowland | 55 |
| ynl | yang1298 | Yangulam | T,
M,
R,
Nuru | 290 |
| ymo | yang1296 | Yangum Mon | T,
W,
Palei | 46 |
| yll | yill1241 | Yil | T,
W,
Wapei | 46 |
| yli | angg1239 | Yali, Angguruk | T,
W,
D,
Ngalik | 111 |
| ykr | yeko1240 | Yekora | T,
G,
B,
Yekora | 218 |
| yki | yoke1238 | Yoke | Lower Mamberamo | 23 |
| yis | yiss1240 | Yis | T,
W,
Wapei | 45 |
| ygw | yagw1240 | Yagwoia | T,
A,
Nuclear Angan | 101 |
| ygr | hira1246 | Yagaria (Hira Dialect) | T,
K,
G,
Kamano-Yagaria | 283 |
| ygr | yaga1260 | Yagaria | T,
K,
G,
Kamano-Yagaria | 229 |
| ygr | huaa1250 | Yagaria (Hua Dialect) | T,
K,
G,
Kamano-Yagaria | 92 |
| yet | yetf1238 | Yetfa | Unclassified | 111 |
| yee | yima1243 | Yimas | R,
L,
Karawari | 251 |
| ydk | yoid1240 | Yoidik | T,
M,
C,
Hanseman | 351 |
| yby | yawe1241 | Yaweyuha | T,
K,
G,
Siane | 377 |
| ybx | yawi1238 | Yawiyo (Wosawari Dialect) | S,
L,
Walio | 96 |
| ybo | yabo1240 | Yabong | T,
M,
R,
Yaganon | 344 |
| ybm | yabe1255 | Yaben | T,
M,
C,
P,
Numugenan | 364 |
| yac | pass1247 | Yali, Pass Valley | T,
W,
D,
Ngalik | 37 |
| rhp | yaha1247 | Yahang | T,
M,
Maimai Proper | 46 |
| ner | yaha1248 | Yahadian | T,
S,
Konda-Yahadian | 41 |
| kpr | kora1294 | Yegha (Yega Dialect) | T,
G,
B,
N,
S,
C,
Gaena-Korafe | 130 |
| kpr | kora1294 | Yegha (Oukena Dialect) | T,
G,
B,
N,
S,
C,
Gaena-Korafe | 83 |
| kpr | kora1294 | Yegha (Ambe-Dofo Dialect) | T,
G,
B,
N,
S,
C,
Gaena-Korafe | 50 |
| kpr | kora1294 | Yegha (Korafe Dialect) | T,
G,
B,
N,
S,
C,
Gaena-Korafe | 520 |
| kkl | kosa1249 | Yale, Korsarek | T,
M,
Eastern | 141 |
| jel | yelm1242 | Yelmek | S,
Yelmek-Maklew | 42 |
| jei | yeii1239 | Yei | S,
M,
Yey | 41 |
| jau | yaur1239 | Yaur | A,
M,
C,
E,
S,
W,
C,
Yaur | 19 |
| jaq | yaqa1246 | Yaqay | T,
M,
Yaqay | 188 |
| jaq | yaqa1246 | Yaqay (Kotup Dialect) | T,
M,
Yaqay | 222 |
| jaq | yaqa1246 | Yaqay (Rayam Dialect) | T,
M,
Yaqay | 119 |
| jaq | yaqa1246 | Yaqay (Wairu Dialect) | T,
M,
Yaqay | 225 |
| jaq | yaqa1246 | Yaqay (Kogo Dialect) | T,
M,
Yaqay | 228 |
| jaq | yaqa1246 | Yaqay (Wanggate Dialect) | T,
M,
Yaqay | 220 |
