Well you are wrong about mantra. You don't have to know the meaning - what is the meaning of OM? Daoism and SFQ use healing sounds without meaning. I don't think your view has any relevance in daoism or hinduism for that matter.
If you want some translated prayers you can look in "Power Healing" by Zhi Gang Sha and you will find some such as "the light of the soul world shines brightly" but those are from his system not SFQ. I would just use material from SFQ if I were you.
My advice is stop analyzing with your intellect - follow the methods of a teacher faithfully. Stop trying to figure it out.
