I hope this post is allowed. Back when I started learning Swedish (TL), listening to songs in Swedish really helped me. However sometimes with other languages I find it hard to find artists I actually like, and the radios often play anglophonic songs, so that doesn't really help.
I thought maybe we could collect different artists singing in our TL we like, so others learning the same language can use them as resources.
Let me start by giving you my examples (edit: updating that list):
Afrikaans: Die Antwoord, Bittereinder, Van Pletzen
Dutch: S10, Noor, Yade Lauren, Typhoon, Doe Maar, Broederliefde, De Jeugd van Tegenwoordig, Opgezwolle, Bob uit Zuid, Ploegendienst
Faroese: Týr, Eivør
Finnish: Korpiklaani
French: Alizée (Pop), Frero Delavega (Pop), Tryo (Reggae), Stromae, Jacques Brel, Indochine, Niagara, Axelle Red, Téléphone, Yseult, Aza Nakamura, Zaho de Sagazan, Ibeyi, Louane, Louise Attaque, Renan Luce, Zaz, Édith Piaf, Indila, Joyce Jonathan, Louane
German: Kraftklub (Indie Rock), Juli (Pop Rock), Berq (Indie Pop), Apache 207, Die Ärzte, Deine Cousine, Donots, Peter Fox, Verrottet, PaulWeltz, ZWE1HÄNDER, Bushido, Christina Stürmer, Cosmó, Danger Dan, Die Fantastischen Vier, Die Toten Hosen, ENGIN, Fettes Brot, Herbert Grönemeyer, Jennifer Rostock, Peter Maffay, Nena, Saltatio Mortis, Schandmaul, Seeed, Silbermond, Soffie, Tic Tac Toe, Tokio Hotel, Versengold, Unheilig, Wir Sind Helden
Greek: Tamta, Marina Satti
Icelandic: Hjálmar, Ásgeir, Mammút, Sigur Rós, Hekla, Sjón
Italian: Andrea Cioffi (Pop), Fabrizio Moro (Soft Rock), Måneskin (Rock), Rose Villain
Japanese: LEX, Creepy Nuts, Liza, Ichiko Aoba, Awich, Atarashii Gakko!, kZm, Tohji, Number_i, JP THE WAVY, HITOMIN, Aklo, KOMOREBI, YENTOWN, Babymetal
Kazakh: Yenlik
Korean: Song Sohee, YUHNWAY, HAON, BeWHY, Wonstein, ZENE THE ZILLA, VANTA01, IceKingKong, Konsole, Idiotape, JUPITER, O5K, CORTIS, Stray Kids, KC, Sik-K, past self, Gwangil Jo, PIRI, Jeffrey White, EK, GRDL, HAAN, Coogie, Kid Milli, NO:EL, BTS
Malayalam: Parimal Shais, Dabzee
Mandarin: 唐兆星 (Asian Don?), 孤兒收容所 (G2SLS), Rapeter, 11 JIAYI, GALI
Mongolian: Enji, Egschiglen
Norwegian: Ane Brun, Mirar
Polish: CRANK ALL, Zdechly Osa, Barto Katt, chillwagon
Portuguese: Jup do Bairro
Russian: HAUK
Serbian: S.A.R.S., Željko Joksimović
Spanish: Alvaro Soler (Pop), Enrique Iglesias (Pop), Juanes (Pop Rock), Charly Garcia, Los Fabulosos Cadillacs, Lido Pimienta, Chancha Via Circuito, Rosalía, November Ultra, Young Miko, Ibeyi, David Biscal, Manu Chao
Swedish: Darin (Pop), Norlie & KKV (Pop Rap), Albin (Rap), Lisa Nilsson, LOK, Slagsmålsklubben, Basshunter, Danny Saucedo, Molly Sandén, Veronica Maggio, Mattias Andréasson
Thai: Milli
Turkish: Can Bonomo (Alternative Rock), Gripin (Alternative Rock), Seksendört (Alternative Rock), Duman, Mor ve Ötesi, Sefo, Ezhel, Rafet El Roman, Can Ozan, Barış Manço, ENGIN, Tarkan
Tuvan: Huun-Huur-Tu, Tuvan Ensemble
Tuareg: Les Filles Des Illighadad
Vietnamese: Tuân Cry, MONO
Yoruba: Ibeyi
What do you think? Maybe you want to add to that list? :)