Slavs
Standardised Slavic languages that have official status in at least one country are: Belarusian, Bosnian, Bulgarian, Croatian, Czech, Macedonian, Montenegrin, Polish, Russian, Serbian, Slovak, Slovene, and Ukrainian.
South Slavs
Today, the majority of South Slavs are Orthodox Christians; most Bulgarians, Macedonians, Serbs and Montenegrins are Orthodox Christians. Most Slovenes and Croats are Roman Catholics. Bosniaks, other minor ethnic groups (Gorani, Muslims by nationality) and sub-groups (Torbesh and Pomaks) are Muslims. Some South Slavs are atheist, agnostic and/or non-religious.
The South Slavic languages, one of three branches of the Slavic languages family (the other being West Slavic and East Slavic), form a dialect continuum. It comprises, from west to east, the official languages of Slovenia, Croatia, Bosnia and Herzegovina, Montenegro, Serbia, Macedonia, and Bulgaria. The South Slavic languages are geographically divided from the rest of the Slavic languages by Germanic (Austria), Hungarian and Romanian.