If you've seen any Hollywood movie set in ancient Egypt, you already know how its language sounded: just like English, but spoken with a more formal diction and a range of broadly Middle-Eastern accents.
They didnt die out, they live there today. I know I had a discussion with an Egytian friend of mine many years ago and asked him innocently who built the pyramids. He said his ancestors did of course. I agreed because it makes sense but I know languages change.Why do people in certain areas have accents ? Ive always wondered about that.