One of my favorite post-rock bands is from Iceland. Sigur Rós. In some of their tracks, they use non-literal language that forms the unintelligible “lyrics” sung by the band.
It’s called Hopelandic (English translation), a.k.a., Vonlenska. It consists of emotive, non-lexical vocables. In effect, Hopelandic uses the melodic and rhythmic elements of singing without the conceptual content of language.
This type of music has no fixed syntax and differs from constructed languages that can be used for communication. It focuses entirely on the sounds of language, lacking grammar and distinct words.
“Milan”, is one of those tunes that can stir my emotions, especially during those peaks of non-lexical passion.
That's new music to me and very enjoyable. I like art that points me in a certain direction but doesn't spell it out for me. The closest music I've known in this way is by Yes. Although there are words with syntax and grammar, the sentences are very abstract, simply pointing to aspiration and spirituality.