The language I am singing in does not "exist" in the real world. The lyrics are supposed to be in a dialect of Adytite (Ämärangnä), a fictional language spoken by the Sarkic Cults (Nälkä) in the SCPF universe. Adytite is supposed to be an old Uralic language that is distantly related to Finnish, Estonian, and Hungarian.
In this song, I was aiming to create something that sounded like a dialect of Adytite spoken by a small Nälkän community situated in Karjala (Karelia). I cross referenced a lot of the words in the lyrics with modern Finnish vocab, the Proto-Uralic database, and the Adytite Language article on the mainsite - I also took some Adytite words that were in OriCat's Klavigar Tales (link below).