[7][8] It refers to the fact that the four peoples communicate effectively without an interpreter due to their mutual intelligibility, which is a key notion when talking about languages.
[9][10][11] Furthermore, it points out that the current language policy of emphasizing differences has led to a number of negative phenomena,[6][12][13] and linguistic expression is imposed as a criterion of ethnonational affiliation and a means of affirming political loyalty.
[21] The Declaration followed the international project Languages and Nationalisms[22][23][24] (founded by two German foundations: Forum Ziviler Friedensdienst and Allianz Kulturstiftung), within which conferences were held in the four countries during 2016, thus providing an insight into the current situation and problems.
[30] An interdisciplinary series of expert conferences in Podgorica, Split, Belgrade and Sarajevo took place under participation of linguists, journalists, anthropologists and others.
[33][34] The titles of debates on the conferences were: More than thirty experts participated in the drafting of the Declaration, half of whom were linguists[35] of different nationalities from the four states.
[37] The initiative emerged just after the last conference in Sarajevo, when young people from Bosnia-Herzegovina[38][39][40] who experienced the educational segregation in the so-called "two schools under one roof"[41] came up with the idea of composing a text that would encourage change of the language policy in all four countries.
[45] The Declaration on the Common Language, with more than two hundred signatures of prominent intellectuals[46][47] from Croatia,[48] Montenegro, Bosnia-Herzegovina and Serbia was simultaneously presented to the public on 30 March 2017 in Zagreb, Podgorica, Belgrade and Sarajevo, where a press conference was held and two panel discussions with titles "What is a common language?"
[50] Two months later, in the framework of the 10th Subversive Festival in Zagreb, a round table on the Declaration, titled "Language and Nationalism", was held.
[73] The Declaration has been signed by "over fifty other linguists, including Anders Ahlqvist, Ronelle Alexander, Nadira Aljović, Bojan Anđelković, Boban Arsenijević, John Frederick Bailyn, Josip Baotić, Ranka Bijeljac-Babić, Ranko Bugarski, Vesna Bulatović, Daniel Bunčić, Costas Canakis, Greville Corbett, Oliver Czulo, Natalia Długosz, Ljiljana Dolamic, Nicholas Evans, Rajka Glušica, Radmila Gorup, Senahid Halilović, Camiel Hamans, Mirjana Jocić, Jagoda Jurić-Kappel, Dunja Jutronić, Dejan Karavesović, Jana Kenda, Ivan Klajn, Snježana Kordić, Svetlana Kurteš, Igor Kusin, Zineta Lagumdžija, Igor Lakić, Gordana Lalić-Krstin, Mia Mader Skender, Alisa Mahmutović, Olga Mišeska Tomić, Vladimir Miličić, Spiros Moschonas, Joachim Mugdan, Zoran Nikolovski, Miloš Okuka, Tatjana Paunović, Dušan-Vladislav Pažđerski, Mira Peter, Tanja Petrović, Enisa Pliska, Milena Podolšak, Luka Raičković, Katarina Rasulić, Marija Runić, Svenka Savić, Marko Simonović, Ljiljana Subotić, Danko Šipka, Dušanka Točanac, Neda Todorović, Aleksandar Trklja, Peter Trudgill, Mladen Uhlik, Hanka Vajzović, Vera Vasić, Elvira Veselinović, Đorđe Vidanović, Ana Ždrale, Jelena Živojinović.