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. http://www.rts.rs/page/stories/sr/story/125/Dru%C5%A1tvo/45760/Srpski+jezik+govori+12+miliona+ljudi+.html Ethnologue.com "Serbo-Croatian". Ethnologue.com. Retrieved 2010-04-24.  Ec.Europa.eu B92.net "Minority Rights Group International : Czech Republic : Czech Republic Overview". Minorityrights.org. Retrieved 2012-10-24.  "Minority Rights Group International : Macedonia : Macedonia Overview". Minorityrights.org. Retrieved 2012-10-24.  David Dalby, Linguasphere (1999/2000, Linguasphere Observatory), pg. 445, 53-AAA-g, "Srpski+Hrvatski, Serbo-Croatian". Benjamin W. Fortson IV, Indo-European Language and Culture: An Introduction, 2nd ed. (2010, Blackwell), pg. 431, "Because of their mutual intelligibility, Serbian, Croatian, and Bosnian are usually thought of as constituting one language called Serbo-Croatian."