Declaration on the Common Language

The Declaration on the Common Language (Serbo-Croatian: Deklaracija o zajedničkom jeziku / Декларација о заједничком језику) was issued in 2017 by a group of intellectuals and NGOs from Bosnia and Herzegovina, Croatia, Montenegro and Serbia who were working under the banner of a project called "Language and Nationalism". The Declaration states that Bosniaks, Croats, Montenegrins and Serbs have a common standard language of the polycentric type.

Source: Wikipedia — Declaration on the Common Language (CC BY-SA 4.0)