* Modern Egyptian Arabic: The most common language in Egypt is Egyptian Arabic. The greeting "hello" is pronounced "Marhabaan" (مرحبا).
* Ancient Egyptian: This is a completely different language, extinct for centuries. There was no direct equivalent of "hello" in the way we use it today.
To be clear, "Marhabaan" is the most common way to say "hello" in Egypt. If you are interested in learning more about the language, I can provide you with additional resources.