True, but I think Kleenix for tissue and Google for search engine are ubiquitous, at least in the US. What carbonated drinks are called changes a lot from one part of the US to another.
I grew up calling it "soda." I knew who called it "pop" or "soda pop" (my dad) but those were unusual. When my sisters and I first heard someone call something that wasn't Coca-Cola a "Coke" it sounded outlandish to us. It seemed as arbitrary as if someone had said that all carbonated beverages were different kinds of 7-Up.
When I was in Louisiana, what I call soda was a "cold drink."
There's no right or wrong, but there is a world of difference from one state to the next.