Holifyre

The language of Angels, this language is so tied to magic that it can only be written down using magic- resistant quills, ink, and paper, lest they be burned with white searing fire and light.
Holifyre is included in the Gether Guide to Languages on DrivethruRPG:
https://www.drivethrurpg.com/product/328473/Gether-Guide-To-Languages