This is my favorite topic ever. Finally, a way to combine my dorky love of language and my dorky love of music.
I have music from probably 50+ countries and territories, so this might not be all of it, but it covers most of it:
Albanian (Blla-Blla-Blla, Roe Dae Woo)
Alsacian (Kroch)
Amharic (Girma Beyene, Samuel Belay, Alemayehu Eshete)
Arabic (Jaffar Hasa'an, Aicha Realizania)
Basque (BAP!!, Kortatu, Kashbad)
Belarusian (Hate To State, Deviation, Pet Nihil)
Bosnian (Rupa U Zidu, No Ones, Zabranjeno Pusenje)
Bulgarian (Review, Novi Cvetya, Control)
Burmese (The Ants, Ghostrider)
Chinese (Blackbird, Brainfailure, A-Jerks)
Croatian/Serbo-Croatian (Kud Idijoti, Nula, Radikalna Promjena)
Czech (Zemezluc, FPB, Radegast)
Danish (City X, Lost Kids, Freshly Riots)
Dutch (BGK, Murder Inc. III, Pandemonium)
English (pretty much everything ever)
Esperanto (Picismo)
Estonian (Osakond 79, Propeller, J.M.K.E.)
Farsi (Mud, Oolanbator, Alookal, Dark Earth)
Finnish (Eppu Normaali, Ypo-Viis, Mopot)
French (Plastic Bertrand, Metal Urbain, Berurier Noir)
Georgian (Retsepti)
German (PVC, Buttocks, Chaos Z)
Greek (Genia Tou Haous, Rita Abadzi, Adiexodo)
Hebrew (Nekhei Naatza, Jean Conflict, Dir Yassin)
Hindi (Nilam Bai)
Hungarian (Aurora, Tizedes Mega Tobbiek, Ulloi Uti Fak)
Icelandic (Purrkur Pillnikk, Fraebbblarnir, Peyr)
Italian (Wretched, I Refuse It!, Cani)
Japanese (The Stalin, Gas, Cobra)
Korean (The Stewducts, Slobbery Dognose, Crying Nut)
Latvian (Inokentijs Marpls)
Lithuanian (Cita Attieksme, Invazija, Turboreanimacija)
Macedonian (Padot Na Vizantija, No Name Nation, F.P.O.)
Malagasy (Sweety Punk)
Malayalam (Specops, Karut, Dirty Dogs)
Mongolian (Mongol Ajalguu)
Nepali (Rai Ko Ris, Jlke & The Rockers, Inside 2 Stoopid Triangles)
Norwegian (Bannlyst, Haeverk, Akutt Inleggelse)
Oromo (Tamrat Ferendji)
Polish (Dezerter, Armia, Moskwa)
Portuguese (Crise Total, Os Replicantes, Ohlo Seco)
Quechua (Enemigos De La Clase, Psicosis Social, Markahuasi)
Romanian (Terror Art, Guranii, Tectonic)
Russian (Vladimir Vysotsky, Grazhdanskaya Oborona, Yanka)
Serbian/Serbo-Croatian (Pekinska Patka, Electricni Orgazam, Ritam Nereda)
Slovak (Extip, Davova Psychoza, Zona A)
Slovenian (Uporniki Bez Razloga, Kuzle, Pankrti)
Spanish (Bajo Tierra, Sedicion, Polo Pepo)
Swedish (Disarm, Grisen Skriker, Mob 47)
Tagalog (Philippine Violators)
Thai (Flesh & Skin, Sepia, Donpheebin)
Turkish (Rashit, Headbangers, Less)
Ukrainian (Vopli Vidopljasova)
Xhosa (Myriam Makeba)