Lisa Gerrard mention! I nearly got to see Dead Can Dance live but then COVID :(

Good, because

she revealed that there is no particular name, grammatical form, or practical translation to the words she uses, and defining them otherwise would defeat the purpose.

It’s not a proper language. It’s rather glossolalia, as she herself mentioned, just without the ritualistic purpose. She’s using the word ‘language’ very loosely in the original interview.

Also, Brendan Perry likewise sings nonsensical lyrics in a bunch of DCD songs.