Yeah sure. Firstly you need to intall the google translator app on your smartphone; either on google play(android) or in the Iphone shop thing...(I've never used an Iphone so I don't know the name) and you download it.
once it's installed you open it, then there should appear 2 languages at the...
I've never used an OCR before (for what I know) but i use the google translator app, I take the screenshot and boom there's the text, but is not always 100% precise, but as long as it says where I should go, which doesn't happen a lot --'
No, Its not like an OCR; basically a patch is an .exe file that changes the game .dat files
(I think).
In a nutshell, it changes the game's main language, in the menu, in the dialog, etc... without any online interference.