Seems to me we're barking up the wrong tree.
Whatever the controller may have said to the Lufthansa flight - there was no misunderstanding there. LH aborted their takeoff. So "Takeoff clearance cancelled" did the job.
It was EA (taxiing in, not taking off) that ended up in the wrong place. The real question is, what was it that EgyptAir did not understand, and what instructions were issued to EA (and in what words)?