| Name | Other Name | Family | Nativ Name | ISO6391 Code | ISO6392T Code | ISO6392B Code | ISO6393 Code | Notes |
|---|---|---|---|---|---|---|---|---|
| Tsonga | Niger–Congo | Xitsonga | ts | tso | tso | tso | ||
| Turkish | Turkic | Türkçe | tr | tur | tur | tur | ||
| Tonga (Tonga Islands) | Austronesian | Faka Tonga | to | ton | ton | ton | ||
| Tswana | Niger–Congo | Setswana | tn | tsn | tsn | tsn | ||
| Tagalog | Austronesian | Wikang Tagalog | tl | tgl | tgl | tgl | Note: Filipino (Pilipino) has the code [fil] | |
| Turkmen | Turkic | Türkmen; Түркмен | tk | tuk | tuk | tuk | ||
| Kazakh | Turkic | қазақ тілі | kk | kaz | kaz | kaz | ||
| Rundi | Niger–Congo | Ikirundi | rn | run | run | run | also known as Kirundi | |
| Quechua | Quechuan | Runa Simi; Kichwa | qu | que | que | que + 44 | macrolanguage | |
| Malayalam | Dravidian | മലയാളം | ml | mal | mal | mal |