Because contact between the Balts and Slavs from the time of Proto-Indo-European was never broken off, it is understandable that Baltic and Slavic should share more linguistic features than any of the other Indo-European languages.
Proto-Slavic began to develop as a separate linguistic entity in the 2nd millennium bc and was to remain quite unified for a long time to come.
The speakers are from diverse linguistic backgrounds (spanning Germanic, Romance, and Slavic native languages).
Such a linguistic tool furthered his belief in a Slavic destiny as successor to the Byzantine church, culture, and political heritage.
Efforts made to impose policies to alter Croatian into "Serbo-Croatian" or "South Slavic" language, met resistance from Croats in form of Croatian linguistic purism.
Linguists generally accept a combination of linguistic and historical reconstruction that postulates a unified East Balkan Romance language area both north and south of the Danube that was broken up sometime between the Slavic invasions (6th 7th century) and the first textual references to Vlachs in Byzantine sources (11th century).
Efforts made to impose policies to alter Croatian into "Serbo-Croatian or Croato-Serbian" or a "South Slavic" language met resistance from Croats in the form of Croatian linguistic purism.
For a fuller contextualization, because the Norse, along with Celtic, Slavic, Vedic, Hellenic (Greek), and others, are part of the cultural-linguistic family known as Indo-European, and using the term 'Druid' in the sense of Indo-European 'priest or intellectual' in contrast to Warrior or Farmer, this included Healers, Bards, Shaman, Seers (diviners), Historians, Judges, etc.
It is generally accepted, however, that Mickiewicz, when referring to Lithuania, meant a historical region rather than a linguistic and cultural entity, and he often applied the term "Lithuanian" to the Slavic inhabitants of the Grand Duchy of Lithuania.
Scholars theorize that the Sun, as a Germanic goddess, may represent an extension of an earlier Proto-Indo-European Sun deity due to Indo-European linguistic connections between Old Norse Sól, Sanskrit Surya, Gaulish Sulis, Lithuanian Saulė, and Slavic Solntse.
