depends on which ancients you refer to, NJ.
The roman and greek languages share a different root than does hebrew.
latin and greek are from the proto-indo-european language family, as are all the germanic, slavic, romance, and even a few Indian (the continent, not our Indians).
hebrew is semetic, and as such shares the same root as arabic.
also, the egyptian language, I don't think, is based off of the sumerian.
the ancient chinese have yet another root language.
so, saying the ancients had the sumerian language root is false. saying that the semetic languages might still be false, but at least it's not a blanket statement covering every ancient civilization on earth.
All a man's knowledge comes from his experiences