| Abbreviation | Definition |
|---|---|
| YUF | HAVASUPAI- WALAPAI- YAVAPAI: a language of U S A |
| YUH | Yue: a language of China |
| YUJ | Karkar- yuri: a language of Papua New Guinea |
| YUQ | Yuqui: a language of Bolivia |
| YUR | Yurok: a language of U S A |
| YUW | Yau: a language of Papua New Guinea |
| YUX | Southern Yukaghir: a language of Asian Russia |
| YVT | Yavitero: an extinct language of Venezuela |
| YWN | Yawanawa: a language of Brazil |
| YWR | Yawuru (an extinct language of Australia) |
| YWR | Yawuru: an extinct language of Australia |
| YWW | Yawarawarga: a language of Australia |
| ZAA | ZAPOTECO, JUÁREZ, SIERRA: a language of Mexico |
| ZAB | ZAPOTECO, SAN JUAN GUELAVÍA: a language of Mexico |
| ZAJ | Zalamo: a language of Tanzania |
| ZAM | ZAPOTECO, MIAHUATLÁN CENTRAL: a language of Mexico |
| ZAP | Zapotec |
| ZAV | ZAPOTECO, YATZACHI: a language of Mexico |
| ZAW | ZAPOTECO, MITLA: a language of Mexico |
| ZAY | ZAYSE- ZERGULLA: a language of Ethiopia |