"Batak is a collective term used to identify a number of closely related Austronesian ethnic groups predominantly found in North Sumatra, Indonesia, who speak Batak languages. ...
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The term is used to include the Karo, Pakpak, Simalungun, Toba, Angkola, and Mandailing which are related groups with distinct languages and traditional customs (adat)." - (en.wikipedia.org 21.08.2022)
