PROTOSLAVIC
Proto-Slavic
Proto-Slavic is the unattested, reconstructed proto-language of all the Slavic languages. It represents Slavic speech approximately from the 5th to 9th centuries AD. As with most other proto-languages, no attested writings have been found; the language has been reconstructed by applying the comparative method to all the attested Slavic languages as well as other Indo-European languages.The above text is a snippet from Wikipedia: Proto-Slavic
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