Bulgarian is an Indo-European language, a member of the Slavic linguistic group. Bulgarian demonstrates several linguistic innovations that set it apart from all other Slavic languages except Macedonian, such as the elimination of case declension, the development of a suffixed definite article, the lack of a verb infinitive, and the retention and further development of the proto-Slavic verb system. Various verb forms exist to express unwitnessed, retold, and doubtful action. Estimates of the number of people around the world who speak Bulgarian fluently range from about 9 million to 12 million. In most sources in and out of Bulgaria before the Second World War, the southern Slavonic dialect continuum covering the area of today's Republic of Macedonia were referred to as a group of Bulgarian dialects. The local variants of the name of the language are balgàrtski, bolgàrtski, bulgàrtski, bògartski, bogàrtski, bùgarski or bugàrski. After WWII, the question about the Bulgarian character of the language in the territory of the Republic of Macedonia was put aside in the name of Bulgarian-Yugoslavian friendship under the pressure of the Soviet Union. After 1958 when the pressure from Moscow decreased, Sofia turned back to the view that the Macedonian language did not exist as a separate language.
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