I [...] mostly treat the vocals as another instrument.
I also like music that have vocals in languages I don’t understand
@oberoniaomnia is making an excellent point about the relative importance of lyrics.
I grew up listening to music in a language I did not understand, so I too treated the voice as an instrument. Those voices conveyed feeling and emotion, but about what? I did not know, and that was okay.
Later, I discovered that songs I really liked actually had embarrassing lyrics and I had to stop liking them, and the other way around.
To this day, I enjoy listening to music in languages in which I am not fluent or that I don’t understand at all.
I like darkwave too, and I don’t know why darkwave artists insist on singing. A good example is Hante., her lyrics are terrible (she writes in English, a language she obviously does not know well) and her voice is awful, but she’s a fabulous DJ. If only she kept her music instrumental.