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Slavic languages, a group of closely related Indo-European languages •
Proto-Slavic language, reconstructed proto-language of all Slavic languages •
Old Church Slavonic, 9th century Slavic literary language, used for the purpose of evangelizing the Slavic peoples •
Church Slavonic, a written and spoken variant of Old Church Slavonic, standardized and widely adopted by Slavs in the Middle Ages, which became a liturgical language in many Eastern Orthodox churches •
Pan-Slavic language, artificially created languages intended to serve as a lingua franca for all Slavic peoples •
East Slavic languages, modern languages of East Slavic peoples •
South Slavic languages, modern languages of South Slavic peoples •
West Slavic languages, modern languages of West Slavic peoples •
Slavic names, names originating from the Slavic languages == Mythology and faith ==