Originally Posted by
Thorwench
I have the information of the later Slavic influx from the Brockhaus which has the same standing in German speaking countries as the Oxford Dictionary has in the English speaking ones. It would also makes sense that there was a Slavic influx anyway since those were territories were the Slavs settled and roamed just like the Huns or the Vikings or even the Turks. It is also the case that the Cossacks had their own language which is, indeed, related to Great Russian as it is called. (again from the Brockhaus and from science paper on Ukrainian languages I once translated).