Serbian (Àdàkọ:Lang-sr-cyr, Latin: srpski, Àdàkọ:IPA-sh) is a standardized register of the Serbo-Croatian language used by Serbs, mainly in Serbia, Bosnia and Herzegovina (mostly Republika Srpska), Montenegro, Croatia, and Macedonia. It is official in Serbia and one of the official languages of Bosnia and Herzegovina, and is the principal language of the Serbs.