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.
Demographics of Slovenia
The official language in Slovenia is Slovene, which is a member of the South Slavic language group. In 2002, Slovene was the native language of around 88% of Slovenia's population according to the census, with more than 92% of the Slovenian population speaking it in their home environment. This places Slovenia among the most homogeneous countries in the EU in terms of the share of speakers of predominant mother tongue. Slovene is sometimes characterized as the most diverse Slavic language in terms of dialects, with different degrees of mutual intelligibility. Accounts of the number of dialects range from as few as seven dialects, often considered dialect groups or dialect bases that are further subdivided into as many as 50 dialects. Other sources characterize the number of dialects as nine or eight.