Agakamon

Agakamon is the language of higher beings, thought to be spoken by the Yods themselves.

Roughly translated, Agakamon means "Language of those who came from air," which is appropriate considering that when a higher being appears on Adelpha, they reportedly fall from the sky in Okaar following a bright flash of light.

Agakamon was brought to Adelpha by Kazar and Fae Rhan, the latter of whom enforced the widespread use of the language throughout the regions.

As Cutter Slade discovered upon his arrival, it is eerily similar to the English language.

Spoilers
Agakamon is, in fact, the English language, brought to Adelpha by the science team.