| Name | Other Name | Family | Nativ Name | ISO6391 Code | ISO6392T Code | ISO6392B Code | ISO6393 Code | Notes |
|---|---|---|---|---|---|---|---|---|
| Venda | Niger–Congo | Tshivenḓa | ve | ven | ven | ven | ||
| Uzbek | Turkic | Oʻzbek; Ўзбек; أۇزبېك | uz | uzb | uzb | uzb + 2 | macrolanguage | |
| Urdu | Indo-European | اردو | ur | urd | urd | urd | ||
| Ukrainian | Indo-European | Українська | uk | ukr | ukr | ukr | ||
| Uighur | Uyghur | Turkic | ئۇيغۇرچە; Uyghurche | ug | uig | uig | uig | |
| Twi | Niger–Congo | Twi | tw | twi | twi | twi | Covered by macrolanguage [ak/aka] | |
| Turkish | Turkic | Türkçe | tr | tur | tur | tur | ||
| Turkmen | Turkic | Türkmen; Түркмен | tk | tuk | tuk | tuk | ||
| Tsonga | Niger–Congo | Xitsonga | ts | tso | tso | tso | ||
| Tswana | Niger–Congo | Setswana | tn | tsn | tsn | tsn |