Bulgarisation (or Bulgarization, Bulgarianisation or Bulgarianization; ) is a term used to describe a cultural change in which something ethnically non-Bulgarian is made to become Bulgarian.

The term is often used in relation to Turks and Romanians.

Romanians and Aromanians

According to the 1926 census, there were 79,728 Balkan Romance speakers in Bulgaria. Most of them lived in the north-eastern part (Dobruja), with some Aromanians in the southern part. They were divided into:

• 69,080 Romanians
• 5,324 Aromanians
• 3,777 Kutsovlachs (the same as Aromanians)
• 1,551 Tsintsars (the same as Aromanians)

According to the 1965 census, there were only 6,000 Romanians.

Turks

During the Communist period of Bulgarian history, the Turkish minority in the south-east of the country was forced to change their names from Turkish to Bulgarian in 1984-1985. This violation of human rights met forceful resistance and was soon abandoned due to large-scale protests, international pressure and even isolated cases of terrorism.

Cultural assimilation