Nelliewoo's back at it again, translating obscure in-game language.
Before we get into the translation, I'd like to provide a little insight on Abyss Lectors:
"Abyss Lectors are creatures that are a part of the Abyss Order... These creatures are evangelists that can chant malefic poetry of the Abyss..."
Abyss Lectors are essentially priests, which is why their battles lines are things like "Peace be with you!" and "The power of revelation!" Thus, I believe the catalysts Lectors use are possibly abyssal holy texts or something similar.
With that said, let's get to the translation! (Disclaimer/sources are at the bottom of the post.)

(Anyone wanna guess who I used to snap this screenshot lol?)
From the Abyssal alphabet to the Latin alphabet:
EGO SUM FATUS
ABYSSI ERGO MUNDO
EX CULMINE LUCIS
<<IN MAGNO>>
OBSCURITATCIS LUX
SE EFFUNDAT IN
MENTES ABYSSO
From Latin to English:
I am fate
The abyss of the world
From the highest summit of light
<<A Great>>
Obscure light
Flows into
Abyss Minds
(Or, in proper sentences:)
I am fate: the abyss of the world from the highest summit of light.
A Great obscure light flows into abyss Minds.
Notes:
>EGO SUM FATUS confused every translator I tried to throw this in. For example, google translate says it means "I am drunk." Always make sure you trust your translator, kids.
>I'm not sure what IN MAGNO applies to. If it applies to the first three lines, then the translation would be "...from the highest summit of light. Obscure light..." If IN MAGNO applies to the last three lines, then it'd be "...from the summit of light. A Great obscure light..." I've combined the two in the above translation because I believe both are valid.
And that's all! Thanks for reading!
A disclaimer: I do not speak Latin! This translation comes from multiple friends and online sources. If anyone knows a better translation for the above, please let me know! I'd be happy to edit this post to prevent the spread of misinformation.
Sources:
Screenshot taken by myself
Genshin Impact Abyss Lectors Wiki
Translated through friends/online sources
Other translation posts, for those interested:
What the graves in Mondstadt say
The (unofficial) Fischl Dictionary
(Edited for grammar/notes correction)

