Bulgarian Sign Language (, BZhE) is the language, or perhaps languages, of the deaf community in Bulgaria.
Primary schools were established for the deaf. Russian Sign Language was introduced in 1910, and allowed in the classroom in 1945, and Wittmann (1991) classifies it as a descendant of Russian Sign.Wittmann, Henri (1991). "Classification linguistique des langues signées non vocalement." Revue québécoise de linguistique théorique et appliquée 10:1.215–88. Bickford (2005) found that Bulgarian Sign is also a marginal part of a cluster with Slovak, Czech, Hungarian, Romanian, and Polish sign languages. The language of the classroom is different from that used by adults outside, and it is not clear if Wittmann and Bickford looked at the same language; nor, if one is derived from Russian Sign, if it is a dialect or if it creolized to form a new language.
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