I like those songs. They sound Nightwishy.
A lot of people think I can sing, but my experience is mostly singing karaoke to people who are probably not the best judges of vocal ability. I used to write a lot of poetry when younger, but nevertheless I find it hard to write lyrics.
Maybe I will listen again some time, and then try to write something for you.
If you can't understand it, it's not in the booklet, it's not on any websites, and the people you tried to pay to help you said no, why not just take your best guess and acknowledge that in your project?