It's all Greek to me

It's all Greek to me.

(informal)

something that you say when you do not understand something that is written or said

Usage notes: This phrase comes from Shakespeare's play, Julius Caesar.

I've tried reading the manual but it's all Greek to me.

Name	Pronounced	Usage
Rhodri	-	Welsh
Qiu	-	Chinese
Biel	-	Catalan
Rory	RAWR-ee	Irish, Scottish
Adelina	ah-de-LEE-nah (Italian), ah-dhe-LEE-nah (Spanish)	Italian, Portuguese, Spanish, Romanian, German, Bulgarian, Ancient Germanic (Latinized)
Petri	PET-ree (Finnish)	Finnish, Basque