For me i’d say vocaloid when i was younger. No clue about now, maybe some russian songs like igorek.
“Fighting in Built-up Areas” by Ladytron. Sung in Mira Aroyo’s native Bulgarian.
historical example: Sukiyaki by Kyu Sakamoto – released in Japan in 1961 under “Ue o Muite Arukō” – released in US in 1963 under “Sukiyaki” because that was about the only Japanese word Americans knew …
I loved his cover of “Calendar Girl” sung in Japanese.
Einstürzende Neubauten: Nagorny Karabach https://youtu.be/hd-6WweqD0Y
(With subtitles in English)
Leek spin https://youtu.be/GCO62VNm67k
Which is actually the Finnish song “Ievan polkka” and not just scatting/jibberish as I always naively used to think
Except, it is mostly scat/jibberish! Just in Finnish! Most of the song is nonsense lyrics.