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.
Croats of Slovenia
The number of Slovenian citizens of Croatian origin is difficult to establish. According to the 2001 census, 35,642 of them declared themselves as ethnically ("nationally", according to the Slovenian terminology) Croatian. In the same census, around 54,000 people declared Croatian as their mother tongue. Ten years earlier, more than 52,000 Slovenian citizens declared themselves as ethnically Croatian, while the number of those with Croatian as their mother tongue was around 50,000.