| Name | Other Name | Family | Nativ Name | ISO6391 Code | ISO6392T Code | ISO6392B Code | ISO6393 Code | Notes |
|---|---|---|---|---|---|---|---|---|
| Ukrainian | Indo-European | Українська | uk | ukr | ukr | ukr | ||
| Urdu | Indo-European | اردو | ur | urd | urd | urd | ||
| Uzbek | Turkic | Oʻzbek; Ўзбек; أۇزبېك | uz | uzb | uzb | uzb + 2 | macrolanguage | |
| Venda | Niger–Congo | Tshivenḓa | ve | ven | ven | ven | ||
| Vietnamese | Austroasiatic | Tiếng Việt | vi | vie | vie | vie | ||
| Volapük | Constructed | Volapük | vo | vol | vol | vol | constructed | |
| Walloon | Indo-European | Walon | wa | wln | wln | wln | ||
| Welsh | Indo-European | Cymraeg | cy | cym | wel | cym | ||
| Western Frisian | Indo-European | Frysk | fy | fry | fry | fry | also known as Frisian | |
| Wolof | Niger–Congo | Wollof | wo | wol | wol | wol |