- Common Slavonic
- Common Slavic on Wikipedia .
The term Proto-Slavic is often used synonymously with the term Common Slavic, denoting a proto-language stage after the loss of quantitive oppositions and monophthongisations, but more proper linguistic use prescribes the usage of the term Proto-Slavic as synonymous with Early Proto-Slavic ( c. 600 CE ), and Common Slavic as synonymous with Late Proto-Slavic ( ca. 8th–9th centuries CE ). In its attributive usage, the noun denotes a historical period when Slavic sound changes occurred in all or almost all Slavic dialects ( ca. 7th–10th centuries ) .