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.
Origin hypotheses of the Croats
Anthropologically, the craniometrical measurements made on the contemporary Croatian population of the city of Zagreb showed it is predominantly dolichocephalic, more specifically mesocephalia and leptoprosopia prevail in South Dalmatia, and brachycephaly and euryprosopy in Central Croatia. According to the 1998-2004 craniometric study of medieval Central European archaeological sites, four Dalmatian and two Bosnian sites clustered with Polish sites, two Continental Croatia (Avaro-Slav) sites were classified into the cluster of Hungarian sites west of the Danube, while the two sites from the Bijelo Brdo culture were into the cluster of Slav sites from Austria, the Czech Republic, and Slovenia. Comparison to the Scythian-Sarmatian sites did not reveal significant similarity in cranial morphology, nor was supported the idea of the Avar frontiersmen. The results indicate that the nucleus of the early Croat state in Dalmatia was of Slavic ancestry, which arrived from the area somewhere in Poland probably along the direct route Nitra-Zalaszabar-Nin, and gradually expanded into the continental hinterland of Bosnia and Herzegovina by the 10th century, however, by the end of the 11th century did not in Eastern Slavonia. The 2015 study of medieval skeletal remains in Šopot (14th-15th century) and Ostrovica (9th century) found out they cluster with other Dalmatian sites as well Polish sites, concluding that "PCA showed that all Eastern Adriatic coast sites were closely related in cranial morphology, and thus, most likely had similar biological makeup".