The designation Southern Slav (or Jugo-Slav, jug, pronounced yug, = south in Serbian) covers Serbs and Croats, and also includes Slovenes; it is only used with reference to the Bulgarians from the point of view of philology (the group of South Slavonic languages including Bulgarian, Serbo-Croatian and Slovene; the East Slavonic, Russian; and the West Slavonic, Polish and Bohemian).