What is "old slavonic"

Old Slavonic may refer to:

• Old Church Slavonic, the first Slavic literary language, standardized in the 9th century
• Old East Slavic, a language used in the 10th–15th centuries by East Slavs in Kievan Rus'
• Proto-Slavic, the reconstructed proto-language of all the Slavic languages, representing Slavic speech in the 5th to 9th centuries AD

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