Slavicisation or Slavicization, is the acculturation of something non-Slavic into a Slavic culture, cuisine, region, or nation. The process can either be voluntary or applied through varying degrees of pressure.
The term can also refer to the historical Slavic migrations to the Balkans which gradually Slavicized large areas previously inhabited by other ethnic peoples. In northern Russia, there was also mass Slavicization of Finnic and Baltic population in the 9th-10th centuries.
The early Slavs were an Indo-European peoples and speakers of the Indo-European dialectswho lived during the Migration Period and the Early Middle Ages (approximately from the 5th to the 10th centuries AD) in Central, Eastern and Southeast Europe and established the foundations for the Slavic nations through the Slavic states of the Early and High Middle Ages. The Slavs' original homeland is still a matter of debate due to a lack of historical records; however, scholars generally place it in Eastern Europe, with Polesia being the most commonly accepted location.
It is generally agreed that ancient Roman writers referred to the ancestors of Slavs as Venedi. The proto-Slavic term Slav shares roots with Slavic terms for speech, word, and perhaps was used by early Slavic people themselves to denote other people, who spoke languages similar to theirs. The first written use of the name "Slavs" dates to the 6th century, when the Slavic tribes inhabited a large portion of Central and Eastern Europe. By then, the nomadic Iranian-speaking peoples living in the European Pontic Steppe (the Scythians, Sarmatians, Alans, etc.) had been absorbed by the region's Slavic-speaking population. Over the next two centuries, the Slavs expanded westwards (to the Elbe river and in the Alps), and southwards (into the Balkans, absorbing Illyrian and Thracian peoples in the process), and also moved eastwards (in the direction of the Volga River). Between the sixth and seventh centuries, large parts of Europe came to be controlled or occupied by Slavs, a process less understood and documented than that of the Germanic ethnogenesis in the west. Yet the effects of Slavicization were far more profound.
Kuči (Montenegrin and Serbian: Кучи, Kuči; Albanian: Kuçi, pronounced [ˈkutʃi]) is a tribe of Albanian origin, historically located in modern central and eastern Montenegro (Brda region), north-east of Podgorica, extending along the border with Albania. Processes of Slavicisation during the Ottoman era and onwards facilitated ethno-linguistic shifts within much of the community. As such, people from the Kuči today largely identify themselves as Montenegrins and Serbs, with a minority still identifying as Albanians. In other areas such as the Sandžak, many Muslim descendants of the Kuči today identify as Bosniaks.
The Kuči first appear in historical records in 1330 as a brotherhood from an Albanian katun near Lake Shkodra under the jurisdiction of the Dečani Monastery. The region itself is first mentioned in 1485 as a nahiyah of the Sandjak of Shkodra. Over time, several waves of settlers came to populate the region and form the historical community of Kuči. The region is known for its resistance against Ottoman rule and its key role in the creation of modern Montenegro. Until the 17th century, the Kuči region was equally Orthodox and Catholic. Today, it is mostly Orthodox except for the Catholic community of Koja. Muslim converts appear since 1485. In the 17th and 18th centuries, both voluntarily and non-voluntarily many people from the pleme began to settle in the Plav-Gusinje, Rožaje and the wider Sandžak region. Many of their descendants identify as Muslim Bosniaks.
The term Vlachs (Croatian: Vlasi) was initially used in medieval Croatian and Venetian history for a Romance-speaking pastoralist community, called "Vlachs" and "Morlachs", inhabiting the mountains and lands of the Croatian Kingdom and the Republic of Venice (Venetian Dalmatia) from the early 14th century. By the end of the 15th century they were highly assimilated with the Slavs and lost their language or were at least bilingual, while some communities managed to preserve and continue to speak their language (Istro-Romanians).
Later in the 16th and 17th century with the Ottoman conquest and mass migrations, the term was primarily used for a socio-cultural and professional segment of the population rather than to an ethnicity, and referred to the mostly Slavic-speaking emigrants and refugees from Ottoman-held territories to the Habsburg Empire (such as Croatia) and the Republic of Venice (Dalmatia), mostly of Eastern Orthodox faith, and to a lesser degree, Catholic. With the nation-building in the 19th century this population played a significant part in the national ideologies in Croatia and Serbia, and according to religious confession espoused either Croat or Serb ethnicity.