| Abbreviation | Definition |
|---|---|
| SOT | Sotho, Southern |
| SPA | South Pacific Ocean |
| SPA | Spanish |
| SQI | Albanian |
| SRC | Logudorese |
| SRD | Sardinian |
| SRF | NAFI: a language of Papua New Guinea |
| SRO | Campidanese |
| SRR | Serer |
| SSA | Nilo-Saharan (Other) |
| SSA | Southern South America |
| SSE | Scottish Standard English |
| SSV | Shark Bay, a language of Vanuatu |
| SSW | Swati, A language of Swaziland |
| SUK | Sukuma |
| SUN | Sudanese |
| SUS | Susu |
| SUX | Sumerian |
| SVE | Swedish |
| SWA | Swahili |