Serbianisation or Serbianization, also known as Serbification, and Serbisation or Serbization (србизација or посрбљавање; serbizimi; сърбизация or посръбчване; србизација; serbificare) is the spread of Serbian culture, people, and language, either by social integration or by cultural or forced assimilation.
Populated by Bulgarians and Romanians, the area between the Morava and Timok rivers became part of the Serbian state in 1291/1292 which began the Serbianisation of the region. Catholic Albanians that came under the rule of Serb Emperor Stefan Dušan were required by state policy to convert to Orthodoxy and Serbianise their Albanian names. Uglješa Mrnjavčević, a fourteenth-century Serbian despot who ruled much of Macedonia on behalf of Serb Emperor Stefan Uroš V attempted to Serbianise the monastic community of Mount Athos.
Torlakian dialect
The historical sources demonstrate that before the 19th century and the rise of nationalism in the Ottoman Empire the majority of the ordinary Orthodox Christians on the Balkans had only a vague idea of their ethnic identity. The local South Slavic-speaking peasants were accustomed to defining themselves in terms of their religion, locality, and occupation. After the national states were established, peasantry was indoctrinated through the schools and military conscription, the official Church, and the governmental press. It was through these instruments of the state administration, that a national identity came into real and rapid development.
Some Serbian sources from the mid 19th century, continued to claim, the areas southeast of Niš, including Southern Pomoravlje and Macedonia, were mainly Bulgarian populated. Per Serbian newspaper, Vidovdan (No. 38, March 29, 1862), the future Bulgarian-Serbian frontier would extend from the Danube in North, along the Timok and South Morava, and then on the ridge of Shar Mountain towards the Black Drin River to the Lake of Ohrid in South.