As for “magi”, it is fairly certain that Matthew wrote originally in Hebrew, and therefore would have used a Hebrew term. This was then translated as “magi”, but which might have only meant “wise men” or “sages”. At this point, and with our scantly knowledge of the cultures, we cannot say why exactly this word was chosen to be used.
“As for “magi”, it is fairly certain that Matthew wrote originally in Hebrew,” According to whom. Most likely Greek, possibly Aramaic. But we will never know because there are no original copies of Mathew’s book in existence.