Finntroll is a Finnish metal band from Helsinki that combines elements of black metal and folk metal. Finntroll's lyrics are mostly in Swedish, the only exception being the song "Madon Laulu" on Visor om slutet. Finntroll's original singer, Katla, decided to use Swedish over Finnish since he was part of a Swedish-speaking minority in Finland and the sound of the language seemed to better suit the band's "trollish" outfit. Despite several vocalist changes, this tradition has continued.

Folk metal is a fusion genre of heavy metal music and traditional folk music that developed in Europe during the 1990s. It is characterised by the widespread use of folk instruments and, to a lesser extent, traditional singing styles. It also sometimes features soft instrumentation influenced by folk rock.