The Bosniaks are a South Slavic ethnic group native to the Southeast European historical region of Bosnia, today part of Bosnia and Herzegovina, and who share a common ancestry, culture, history and the Bosnian language. Traditionally and predominantly adhering to Sunni Islam, they constitute native communities in what is today Bosnia and Herzegovina, Serbia, Montenegro, Croatia and the Republic of Kosovo. Largely due to displacement stemming from the Bosnian War in the 1990s they also make up a significant diaspora with several communities across Europe, the Americas and Oceania.