Languages:
| Isocode | Glottocode | Language | Classification | Count |
|---|---|---|---|---|
| jei | yeii1239 | Yei | 48 | |
| yii | yidi1250 | Yidiny | 48 | |
| yiy | yiry1245 | Yir-Yoront | 48 | |
| ygr | Yagaria | T, K, G, Kamano-Yagaria | 76 | |
| pli | Yom | N, A, V, N, G, C, N, O, Yom-Nawdm | 48 | |
| gcd | Yukulta | Tangkic; Australian | 48 | |
| yee | Yimas | R, L, Karawari | 48 | |
| ylr | Yalarnnga | A, P, N, Kalkatungic | 75 | |
| yup | Yukpa | 48 | ||
| ner | Yahadian | T, S, Konda-Yahadian | 52 | |
| kld | Yuwaalaraay | A, P, S, New South Wales | 76 | |
| yad | Yagua | Peba-Yaguan | 48 | |
| yau | Yuwana | 47 | ||
| mpj | Yulparija | A, P, W, N, D, Wati | 76 | |
| urf | Yadhaykenu | P, P, N, N, Uradhi | 48 | |
| yss | Yessan-Mayo | S, Tama | 48 | |
| xyy | Yorta Yorta | A, P, S, Victorian | 76 | |
| yij | Yindjibarndi | A, P, W, N, S, Pilbara | 76 | |
| jbw | Yawijibaya | A, W, Western Worrorran | 19 | |
| yey | Yeyi | N, A, V, B, B, S, N, C, R, Yeyi (R.41) | 48 | |
| ycn | Yucuna | 48 | ||
| yma | Yanomama | Yanoman; Ninam–Yanomam-Yaroame; Yanomamɨ | 36 | |
| jae | Yabem | A, M, C, E, O, W, N, H, North | 82 | |
| yab | Yuhup | 48 | ||
| yor | Yoruba | N, A, V, B, D, Y, Edekiri | 48 | |
| yui | Yurutí | 48 | ||
| jel | Yelmek | Yelmek-Maklew | 64 |
27 languages