Serbo-Croatian ( ; srpskohrvatski / српскохрватски or hrvatskosrpski/ хрватскoсрпски; also called Serbo-Croat , Serbo-Croat-Bosnian [SCB], Bosnian-Croatian-Serbian [BCS], or Bosnian-Croatian-Montenegrin-Serbian [BCMS]) is a South Slavic language and the primary language of Serbia, Croatia, Bosnia and Herzegovina, and Montenegro. It is a pluricentric language with four mutually intelligible standard varieties.