Nice reaction, Igorrr is amazing. This is one of his most accessible songs, if you want more I'd suggest: Cheval, ieuD, or Parpaing. They sing in the "öxxö xööx" language, it was invented by the vocalists.
^This person knows their Igorrr!!! Great shouts with those tracks, would suggest the first two over Parpaing purely because Parpaing is a bit more of a straightforward composition compared to the rest.
They're singing in the same vocal syllables as Oxxo Xoox, it's a made-up choir/vocal dictionary, they even assigned some general meaning to each made up word to kindof get a feel for what they're implying with the singing.
Meanwhile MRBUNGLE has gothic rock, funk, ska punk, free jazz, ska, surf rock, punk, heavy metal, klezmer, kecak, avant-jazz, folk, noise rock, alternative metal/funk metal, pop, doo-wop, electronica, swing,space age pop and exotica, death metal, rockabilly, bossa nova, progressive rock, country and western, circus music, video game music, and cartoon music, Experimental rock, experimental, alternative metal, avant-garde metal, thrash metal. has this many genres :D