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Bosnian, Croatian, Serbian

Although Serbo-Croatian was until recently an accepted linguistic designation for a single Slavic language that included variants of Serbian (written in both the roman alphabet and Cyrillic), Bosnian, and Croatian (written in the roman alphabet), the political situation in the former Yugoslavia caused the variants to diverge, and most linguists now consider Serbian, Croatian, and Bosnian to be separate and distinct languages.

The term Serbo-Croatian should no longer be used.  Write:
            Croat:               noun
            Croatian:        adjective and language

Since the republics became independent, the languages continue to evolve, especially Croatian.

Alternative terms are recognized in sources such as the Summer Institute of Linguistics Ethnologue.