I haven't looked this up yet, but definitely will. I have a blind friend who, like me, loves etymology. There's a great book called The Story of English that is wonderful on this subject! My husband said that when he had a platoon in Vietnam, some of his soldiers insisted it was pop, others insisted it was soda. I just laughed and said he had no New Englanders, because they used to call it tonic. He said he had to do something, they were literally coming to blows about it. So he declared that it was soda-pop, period. Both words, every time.
One time we were having drinks with friends, and someone said, "oh, don't pay it is XXX's shout." Huh? Since then I've known many Aussies and Brits, but at the time I didn't have a clue.
I read a lot of British, Scottish novels so can keep up to a degree. Are there any great, no make that fun, South African novelists? I'll move over to the book lline and re-post that question.