There is an ongoing controversy over ethnic and linguistic identity in Montenegro, over the national identity and the name of the language spoken by Montenegro's main ethnic group. The central issue is whether Montenegrins constitute a subgroup of Serbs or a separate ethnic group; the latter identification has been adopted by the Montenegrin political regime since the 1990s. As of 2007, the official language is "the Montenegrin language", however, the majority of citizens declared Serbian as their native language. According to the 2011 census, the "Montenegrins" were 44.98% and "Serbs" 28.73%; "Montenegrin language" at 36.97% and "Serbian language" at 42.88%.