Finntroll - From the Depths of the Earth

Finntroll is a folk metal band from Finland. They combine black metal and Finnish polka, called humppa. Although it is a Finnish band, Finntroll's lyrics are in Swedish, because Swedish just sounds "damn trollish", according to the band's first vocalist, Katla (whose native tongue is Swedish). Swedish is a native language of Finland, along with Finnish.
In 2004, the band released an EP, Trollhammaren, and an album called Nattf?dd. They then tour Europe and attended several metal summer festivals.