Slovakia:
Slovak (official), Hungarian

Slovenia:
Slovenian 91%, Serbo-Croatian 6%, other 3%

Solomon Islands:
Melanesian pidgin in much of the country is lingua
franca, English spoken by 1%-2% of population

note: 120 indigenous languages

Somalia:
Somali (official), Arabic, Italian, English

South Africa:
11 official languages, including Afrikaans, English,
Ndebele, Pedi, Sotho, Swazi, Tsonga, Tswana, Venda, Xhosa, Zulu

Spain:
Castilian Spanish (official) 74%, Catalan 17%, Galician 7%,
Basque 2%

Sri Lanka:
Sinhala (official and national language) 74%, Tamil
(national language) 18%, other 8%

note: English is commonly used in government and is spoken
competently by about 10% of the population

Sudan:
Arabic (official), Nubian, Ta Bedawie, diverse dialects of
Nilotic, Nilo-Hamitic, Sudanic languages, English

note: program of "Arabization" in process

Suriname:
Dutch (official), English (widely spoken), Sranang Tongo
(Surinamese, sometimes called Taki-Taki, is native language of
Creoles and much of the younger population and is lingua franca
among others), Hindustani (a dialect of Hindi), Javanese

Svalbard:
Russian, Norwegian

Swaziland:
English (official, government business conducted in
English), siSwati (official)

Sweden:
Swedish

note: small Lapp- and Finnish-speaking minorities

Switzerland:
German (official) 63.7%, French (official) 19.2%,
Italian (official) 7.6%, Romansch 0.6%, other 8.9%

Syria:
Arabic (official); Kurdish, Armenian, Aramaic, Circassian
widely understood; French, English somewhat understood

Tajikistan:
Tajik (official), Russian widely used in government and
business

Tanzania:
Kiswahili or Swahili (official), Kiunguju (name for
Swahili in Zanzibar), English (official, primary language of
commerce, administration, and higher education), Arabic (widely
spoken in Zanzibar), many local languages

note: Kiswahili (Swahili) is the mother tongue of the Bantu people
living in Zanzibar and nearby coastal Tanzania; although Kiswahili
is Bantu in structure and origin, its vocabulary draws on a variety
of sources, including Arabic and English, and it has become the
lingua franca of central and eastern Africa; the first language of
most people is one of the local languages

Thailand:
Thai, English (secondary language of the elite), ethnic
and regional dialects

To