the language.Ronelle Alexander, Bosnian, Croatian, Serbian: A Grammar with Sociolinguistic Commentary (2006, The University of Wisconsin Press) Daniel Bunčić concludes that it is a pluricentric language, with four standard variants spoken in Serbia, Croatia, Montenegro, and Bosnia-Herzegovina. The mutual intelligibility between their speakers "exceeds that between the standard variants of English, French, German, or Spanish". "There is no doubt of the near 100% mutual intelligibility of (standard) Croatian and (standard) Serbian, as is obvious from the ability of all groups to enjoy each others' films, TV and sports broadcasts, newspapers, rock lyrics etc." Other linguists have argued that the differences between the variants of Serbo-Croatian are less significant than those between the variants of English, German, Dutch, and Hindustani. Among pluricentric languages, (ÖNB). Serbo-Croatian was the only one with a pluricentric standardisation within one state. The dissolution of Yugoslavia has made Serbo-Croatian even more of a typical pluricentric language, since the variants of other pluricentric languages are also spoken in different states. As in other pluricentric languages, all Serbo-Croatian standard varieties are based on the same dialect (the Eastern Herzegovinian subdialect of the Shtokavian dialect) and consequently, according to the sociolinguistic definitions, constitute a single pluricentric language (and not, for example, several Ausbau languages). According to linguist John Bailyn, "An examination of all the major 'levels' of language shows that BCS is clearly a single language with a single grammatical system." In 2017, numerous prominent writers, scientists, journalists, activists and other public figures from Croatia, Bosnia-Herzegovina, Montenegro and Serbia signed the Declaration on the Common Language, which states that in Croatia, Serbia, Bosnia-Herzegovina and Montenegro a common polycentric standard language is used, consisting of several standard varieties, such as German, English or Spanish. Alt URL Contemporary names The use of Serbo-Croatian as a linguistic label has been the subject of long-standing controversy. Wayles Browne calls it a "term of convenience" and notes the difference of opinion as to whether it comprises a single language or a cluster of languages. Ronelle Alexander refers to the national standards as three separate languages, but also notes that the reasons for this are complex and generally non-linguistic. She calls BCS (her term for Serbo-Croatian) a single language for communicative linguistic purposes, but three separate languages for symbolic non-linguistic purposes. The current Serbian constitution of 2006 refers to the official language as Serbian, while the Montenegrin constitution of 2007 proclaimed Montenegrin as the primary official