For a simple reason (hopefully you'll read it): what happen in the very moment you translate the functions in italian? That Nucleo.prototype.FinestraBase(altezza) will become senseless to anyone else.
So I can't give nor receive help.
The same is for interface and any other terms.
English is a very easy and plain language, so anyone can use it to communicate on a shared basis.
English is the International Language. Much of the world either speaks english as a first language or learns English as a secondary language. RPGMaker is not unique in releasing International versions in English. Its quite common to do so.