Saint Kitts and Nevis
English

Saint Lucia
English (official), French patois

Saint Pierre and Miquelon
French (official)

Saint Vincent and the Grenadines
English, French patois

Samoa
Samoan (Polynesian), English

San Marino
Italian

Sao Tome and Principe
Portuguese (official)

Saudi Arabia
Arabic

Senegal
French (official), Wolof, Pulaar, Jola, Mandinka

Serbia and Montenegro
Serbian 95%, Albanian 5%