Koiné language

Koine language is a kind of language that was spoken a long, long time ago in the Mediterranean region, which included places like Greece, Egypt, and Israel. It was used during the time of the Roman Empire and is a special kind of Greek language that many people could understand even if they came from different parts of the world.

Think of it like this: Just like how you might learn some words and phrases in another language if you go on vacation, the Greeks during the Roman Empire also learned how to use some different words and grammar when speaking Greek so that people could understand them better.

So, Koine language is just a special way of speaking Greek that many people could understand, even if they didn't speak the same type of Greek from the same place. It helped people communicate and understand each other across different countries and cultures.