Albanisation (or Albanianisation) is the linguistic or cultural assimilation to the Albanian language and Albanian culture.
In the newly attached territories to Albania of Kosovo and western Macedonia by the Axis powers, non-Albanians (Serbs and Macedonians) had to attend Albanian schools that taught a curricula containing nationalism alongside fascism and were made to adopt Albanian forms for their names and surnames.
The concept is most commonly applied to Kosovo. During censuses in the former Yugoslavia, many Romani and Turks were registered as Albanian, as they identified with Muslim Albanian culture as opposed to the Christian Serbian culture. Albanisation has also occurred with Torbesh people, a Muslim Slavic minority in the Republic of Macedonia, and the Goran people in southern Kosovo, who often have Albanised surnames.
The term Arnautaši (from Arnauti, a historical Turkish term for Albanians) was coined by 19th century (nationalist) Serbian historians and means "Albanized Serbs" (Serbs who had converted to Islam and went through a process of Albanisation). The term attributed to most Northern Albanians (Ghegs) was created to explain the large numbers of Albanians in Kosovo in that migrations of Albanians from Northern Albania was the migration of Serbs to another place and not of a different people. While the theory that acquired its maximal form by nationalist Serb writers Spiridon Gopčević and Miloš Milojević became popular among some Serb historians, Western based historians dismiss it on grounds that had the population been Serbian in Northern Albania, when and how did the process of Albanianisation occur in the first place.