Would someone be my koine greek buddy?

Koine Greek (==common greek == the greek language after alexander the great, the language of the new testament).

I have no idea of what kind the questions in your book are, but maybe I can help. I'm Greek also and I know some ancient greek.

Although I don't understand what you mean by koine, I would like to help you. Greeklish, is a bit difficult to be expressed in computer language.

Is it koina ellhnika? =Common Greek?

The Bible in Greek is ΒΙΒΛΟΣ= vivlos

"ΚΑΙΝΗ ΔΙΑΘΗΚΗ" sounding as keni diathiki is a part of the Bible.