The thing that is bugging, and have been bugging me sense SG-1, is the fact that everybody in every galaxy and on every planet they get to is speaking English with little variation in the dialect. I have watched all the movies and every episode of both SG-1 and SGA and i can't remember any time where they explain this, other then that everyone ascends from earth. That is an okay explanation but still then they would be speaking old English and not know all the same words that we use, and are we to believe that everybody was taken from England.
It is only in the first movie that this is a problem, with them being from Egypt.
What I would like to know is if anyone can remember if they explained this at anytime?