What Language Is This? (Darkest Night Text)

[Rocl]

Huh! Neat! I hadn't even thought to look at Shinryu's wings because I assumed it was the same as this generic "magic" text that's been used since 2.0.

Let's see if I can't try to help here... (the actual words aren't in caps but it felt appropriate to shout them)
It looks like his wings just get 2 lines and the colour varies depending on the spell they're casting:
Left wing: BRUTALITY SEVERITY FEROCITY
Right wing: RETRIBUTION REVENGEANCE

I didn't see anything else there from scouring youtube videos, but that's a really neat catch!

But, yes, the text in Blackest Night, rather unfortunately, is the generic magical text previously seen in Scholar's spells, Tri-bind, Book of Spades, etc. It is interesting that Dark Knight somehow uses the same text as Arcanist though maybe there's a connection! (It shows up in Adloquium and Succor too, as illustrated below)

I don't think there's a connection