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.
Vlachs in the history of Croatia
However, despite this cross-pollination of language some groups of Vlachs may have remained distinct from the Slavs; historical sources from the 14th-15th century differ Slavs and Vlachs in the area of Kotor, Dubrovnik, Bosnia and Croatia ("Slavi et Vlachy", "Vlachy et Bosgniani", "Serbi et Vlachi"). In 1345, in Cetina "Croati et Olachy" are differed, while in a 1436 document, Catholic Vlachs of the county of Cetina (around the town of Sinj) were represented as distinct from both the Croats and the Serbs inhabiting the county. In 1450, in the area of Šibenik were differed "Morlachi ac Hervati". In a book by Ragusan historian Ludovik Crijević (1459-1527), "Writings on the Present Age", Vlachs ("Valachos") were distinguished from other people, and were mentioned as "nomadic Illyrians who in the common language are called Vlachs" and there is also the mention of the present-day surname Kožul/lj in "Cossuli, a kind of Illyrian people considered Romans". During the Orthodox migration to Žumberak in 1538, general commander Nikola Jurišić mentioned the Vlachs who "in our parts are called as Old Romans" separate from the Serbs and Rascians.