Kooshan G. answered 06/08/19
Experienced in Math and Coding! And also Piano!
Hey there!
I see that you are using Persian words in your sentences! Proud!
As far as I know as a native speaker, inner peace translation would be "آرامش درونی" which is pronounced as "aramesh-e-darouni". Also, there are idioms that you can interpret inner peace meaning from them, but I can't think of any specific idiom that Exactly relates to inner peace.