I have been listening to these guys since the 90s and I still get excited every time a new album is coming out. I am always a fan but, even knowing that, I think this next album is showing signs of being especially good.
This channel is good. Very relaxing folk music. Reminds me of 90s Enya, which I also enjoyed a lot of. Sounds like she is singing in Russian or some other slavic language. Definitely a lot of hard consonants in there, and definitely not Japanese.
I read the vid description a bit, the author invented a proto celtic language. The first few tracks sound more elfy or finnish, but later on it definitely sounds more gaelic.
We found it in a VR chat world that had it streaming as the background music.