It depends how you look at it (and which time period).

The empire of Egypt started building Pyramids around 3000BC (at that point in time there weren't many tribes in the area anyway). You only had a few civilizations that settled down - mostly they were nomadic tribes. Those spoke different languages depending where they came from - but the only elevated language these tribes knew was Egyptian - so they used it (it's at least highly probably - not proven yet) to comunicate with others. But these nomadic tribes were of the similar origin as Egyptians - and only they had a developed language capable of higher abstract thought. It's not easy to understand that - but take a look at many words of latin origin in our languages (it's not because of the christianity - but because of the lack of apropriate words in the 'barbaric' languages). And other language groups (germanic, slavic,...) had languages much more different from Latin then those tribes from Egyptian.
Another such language was Sumerian - but the two cultures had no direct contact - although they knew of the existance of the other.
Later in history other tribes came to the region (and the population grew - so there were more tribes - from further away). But this is between 1500BC and 1000BC. At this point in time it's unrealistic to claim that they spoke the same language - but Egyptian was certainly the 'lingua franca'.

You, too, percist guess that makes you at least as heardheaded as I am.

Somehow I still don't understand how hardheadedness is a bad thing :blink:

so, pyramids turned into how languages are derived from eachother? ok :P

Well the pyramids themselves are an importaint monument to the society - and since they are reaching towards the sky (although not at the correct geographical location) you might say they turned into our little Tower of Babel.

Egypt hmmmmmmmmm never been to that country is it nice..... :blink:

yes and no.

The fake tourist cities/hotelresorts in the Sinai are wonderfull, little slices of heaven

Cairo itself is probably one of the filthiest cities on earth.
Channels filled with trash, trucks with misc. animal parts on top rotting in the sun during a traffic jam.
And the city ruins almost everything, the city is REALLY close to the pyramids and the shops nearly border the sphinx... did ruin the atmosphere a bit.