Church Slavic; Old Slavonic; Church Slavonic; Old Bulgarian; Old Church Slavonic
教会斯拉夫语; 古斯拉夫语; 教会斯拉夫文; 古保加利亚语; 古教会斯拉夫语
A language used in the liturgy and religious texts of the Eastern Orthodox Church, based on Old Bulgarian and Old Macedonian.