| Name | Other Name | Family | Nativ Name | ISO6391 Code | ISO6392T Code | ISO6392B Code | ISO6393 Code | Notes |
|---|---|---|---|---|---|---|---|---|
| Russian | Indo-European | русский | ru | rus | rus | rus | ||
| Thai | Tai–Kadai | ไทย | th | tha | tha | tha | ||
| Tigrinya | Afro-Asiatic | ትግርኛ | ti | tir | tir | tir | ||
| Tibetan | Sino-Tibetan | བོད་ཡིག | bo | bod | tib | bod | also known as Standard Tibetan | |
| Yoruba | Niger–Congo | Yorùbá | yo | yor | yor | yor | ||
| Yiddish | Indo-European | ייִדיש | yi | yid | yid | yid + 2 | macrolanguage. Changed in 1989 from original ISO 639:1988; ji. | |
| Xhosa | Niger–Congo | isiXhosa | xh | xho | xho | xho | ||
| Western Frisian | Indo-European | Frysk | fy | fry | fry | fry | also known as Frisian | |
| Wolof | Niger–Congo | Wollof | wo | wol | wol | wol | ||
| Welsh | Indo-European | Cymraeg | cy | cym | wel | cym |