World Codex
Zafu
Vubopa Religious Language
Zafu, lit. tongue, is a language that is used by Vopa priests to communicate with each other over long distances or secretly to avoid being interrupted by others. It uses tones to express meaning, and it is possible to hum it conversationally.
Writing System
Zafu does not have a specific writing system, but sigils with tone indicators included on them can approximate common prayers.