| Name | Other Name | Family | Nativ Name | ISO6391 Code | ISO6392T Code | ISO6392B Code | ISO6393 Code | Notes |
|---|---|---|---|---|---|---|---|---|
| Sundanese | Austronesian | Basa Sunda | su | sun | sun | sun | ||
| Swahili | Niger–Congo | Kiswahili | sw | swa | swa | swa + 2 | macrolanguage | |
| Swati | Niger–Congo | SiSwati | ss | ssw | ssw | ssw | also known as Swazi | |
| Swedish | Indo-European | Svenska | sv | swe | swe | swe | ||
| Tagalog | Austronesian | Wikang Tagalog | tl | tgl | tgl | tgl | Note: Filipino (Pilipino) has the code [fil] | |
| Tahitian | Austronesian | Reo Tahiti | ty | tah | tah | tah | One of the Reo Mā`ohi (languages of French Polynesia) | |
| Tajik | Indo-European | тоҷикӣ; toçikī; تاجیکی | tg | tgk | tgk | tgk | ||
| Tamil | Dravidian | தமிழ் | ta | tam | tam | tam | ||
| Tatar | Turkic | татар теле; tatar tele | tt | tat | tat | tat | ||
| Telugu | Dravidian | తెలుగు | te | tel | tel | tel |