The Eastern Herzegovinian dialect (, Serbo-Croatian: istočnohercegovački/источнохерцеговачки or istočnohercegovačko-krajiški/источнохерцеговачко-крајишки) is the most widespread subdialect of the Shtokavian dialect of Serbo-Croatian, both by territory and the number of speakers. It is the dialectal basis for all modern literary Serbo-Croatian standards: Bosnian, Croatian, Serbian, and Montenegrin (the latter only partially codified).