Why were the Greeks the only people to translate the Bible?

Answer 1

It is not that the Greeks translated the Bible at all. After the conquests of Alexander the great, the Greek language became the lingua franca of the entire Middle East. Every nation adopted a dialect of Greek known as Greek Koine, except the Jews, who retained Aramaic in honour of the Persians who had allowed their return from Exile. Even the Jews of the diaspora, in Egypt, Syria and Babylon, adopted Greek as their everyday language.

The diaspora Jews spoke and wrote in Greek, gradually losing skills in the ancient Hebrew language. They commissioned the Septuagint, the earliest translation of the Hebrew scriptures into Greek. This was of no interest to the Greeks themselves.

The New Testament did not need translation into Greek, as it was written in Greek in the first instance.