Esoteric Symbols Language
Lingua Ignota of Hildegard von Bingen
Hildegard von Bingen produced her own language; the glossary, text, grammar structure flowed through her, was delivered to her, as a visionary, a mystic. She suffered headaches that offset her enlightenment..
https://en.wikipedia.org/wiki/Hildegard_of_Bingen
“…. weird scales in Hildegard’s music which are sometimes positively alarming and hauntingly beautiful.”
xenoglossia – speaking in tongues unknown
glossalolia – singing in tongues unknown
Vulcan, Klingon, Dothraki