Slavic Languages: Russian, Polish, Belarusian, Ukrainian, Polish, Czech, Slovak, Slovenian, Serbian, Croatian, Macedonian, Bulgarian
a) Proto-Slavic language formed from the peripheral-type Baltic dialects;
b) Slavic linguistic type formed later from the Baltic languages structural model;
c) the Slavic structural model is a result of the Baltic languages structural model transformation.
The Slavic languages are divided intro three subgroups: East, West, and South, which together constitute more than twenty languages. Of these, ten have at least one million speakers and official status as the national languages of the countries: Russian, Belarusian and Ukrainian (of the East group), Polish, Czech and Slovak (of the West group) and Slovene, Serbo-Croatian, Macedonian and Bulgarian (of the South group).