I'm just getting into metal and I've found that it's pretty calming for me. While English is basically my first language, I wanna hear about some bands that aren't English-speaking (ie, Spanish, Mandarin, Korean, Qechua, etc...)
Their music often has themes of mythology from various countries so they use different languages. This one is in English, but it's my favorite so I have to mention it: Gilgameš. I hope you like it, I think Rotting Christ makes truly amazing music.