American spelling is taking over because of spell checker, because today's products from our education system do not know to spell.
A small true anecdote;
When the RNZAF bought their new C130H Hercules in the late 60s, New Zealanders were sent to the USA for training.
The Americans sent them all on an English language course; officers SNCOs and aircraft tradesmen.
Great ructions -they refused to attend.
The USAF Base Commander tried to tell it as it was to the RNZAF officers, "All foreign aid personnel are required to attend this course".
First mistake - the USAF Brigadier was told in no uncertain terms that this was not foreign aid - it was a NZ Government Purchase.
Then the near diplomatic incident from the NZ team commander, Wing Commander Bernie O'Connor.
"You bastards go away and learn to spell and write English, and when you think you know how to, come back and we will check you out."
Caused more than a bit of a stir at the time, but the point was made, the Kiwis didn't have to attend English Language tuition from the Americans.