Growing up in Australia, for me a carbonated drink like Pepsi or Fanta or lemonade was always just a "soft drink". (Also, 'lemonade' in Australia was something different to 'lemonade' in the US; it's something close to 7-Up.) So when I moved to Seattle, it was surprising to me that all such things were called "pop". And then I travelling across the US, and realised it was also "soda" (which, to an Australian, is exclusively club soda), and even sometimes "coke". Not capital-C Coke, but "coke", meant any generic soft drink. It's all very confusing.