Praslovanské
Praslovanské refers to the reconstructed proto-language from which all Slavic languages are believed to have descended. It is not a language that was ever written down, but rather a theoretical linguistic construct developed by comparative linguists through the study of similarities and differences among modern and historical Slavic languages. By tracing sound changes and grammatical patterns backwards, scholars have been able to hypothesize the form and structure of this common ancestor.
The period when Praslovanské was spoken is generally estimated to have been between the 5th and 8th
Key features of reconstructed Praslovanské include a complex system of noun declensions and verb conjugations, a