Hey, I made a Spotify playlist. It has one song per language.
So far there’s Arabic, Bulgarian, Danish, Dutch, English, Finnish, French, German, Greek, Haitian Creole, Hindi, Hungarian, Icelandic, Italian, Latin, Lingala, Low German, Portuguese, Pulaar, Sardinian, Spanish, Swabian (I know. It’s not a language), Swedish, Tamil, Turkish, Tuvan (?), Vonlenska/Hopelandic, Welsh and West Flemish.
Maybe there’s too much of the blatantly obvious (Björk’s first band, Huun-Huur-Tu, Jacques Dutronc, Tarkan, Tenores di Bitti…). But it’s all stuff I like a lot.
P.S. Sadly, the amazingly brilliant album „Kazemachi Roman“ (1971) by Happy End isn’t available on Spotify, so Japanese is still missing from the list.