Rhegion?

[Mikhail Mengsk]

Then why did the official language in many states remain Greek?

Modern greek is not ancient greek. Anyway, just few states speaks greek today. Spanish, French and Italian (Romanian is influenced too) came from Latin, not greek.

Why are so many scientific terms written in Greek?

Most of them are written in latin, come on! The latin became the scientific and cultural language and is STILL used...

Why did later Byzantine Emperors adopt Greek as their official language?

Because they were a mixture of hellenic, eastern and roman cultures. Maybe Greek was the most used language in their domains, so they adopted it. Logic.

Should i say how many other countries adopted Latin? No, it's worthless: they used Latin because in their domains the Latin was the dominant language...

Why is Latin itself nothing more than a copy of an Euboian Greek dialect?

Maion

It's a different language at all it's only, and obviously, influenced by Greek.

Because the hellenic culture was spreaded through entire mediterranean area, so it's obvious that a rising power in the area would be greately influenced by that. The Magna Grecia was relatively near to Rome, and very powerful at the time.