Complex sentence: Another main part of their music is Goran's (both Tanevski and Trajkovski) vocals which are based on Eastern Orthodox church chant and lot of the songs are in Church Slavonic language.
Split into simpler sentences: Another main part of their music is Goran's (both Tanevski and Trajkovski) vocals which are based on Eastern Orthodox church chant. Lot of the songs are in Church Slavonic language.