S
- Sa'a
- Samoan
- San Blas Kuna
- San Mateo Del Mar Huave
- San Miguel El Grande Mixtec
- Sanga (Democratic Republic of Congo)
- Sangir
- Sango
- Santali
- Sapo
- Sar
- Sayula Popoluca
- Sena
- Serbian
- Shan
- Shilluk
- Shipibo-Conibo
- Shona
- Shughni
- Sierra de Juárez Zapotec
- Sinasina
- Sinaugoro
- Sinhala
- Slovak
- Slovenian
- South Bolivian Quechua
- Southern Bobo Madaré
- Southern Sotho
- Southern Subanen
- Spanish
- Sranan Tongo
- Sundanese
- Swahili
- Swati
- Swedish
T
- Tabasco Chontal
- Tae'
- Tagalog
- Tahitian
- Tai Dam
- Taita
- Tamil
- Taroko
- Tase Naga
- Tausug
- Tboli
- Tedim Chin
- Telugu
- Tenango Otomi
- Tepeuxila Cuicatec
- Tereno
- Tetela
- Tetelcingo Nahumuatl
- Thai
- Tibetan
- Tiv
- Tlahuitoltepec Mixe
- Tojolabal
- Tok Pisin
- Tonga (Tonga Islands)
- Tonga (Zambia)
- Toraja-Sa'dan
- Toro So Dogon
- Tsonga
- Tsou
- Tswa
- Tumbuka
- Turkana
- Tuvalu
- Tuvan
- Tzeltal
- Tzotzil