>“Coke” is the generic word for all soda/pop, including Pepsi, in much of the US and world
I don't think this is even true for most of the USA, much less the world. I've never heard anyone refer to anything except a cola as "coke" although I heard that was the vernacular in some subset of the US... some southern US states?
It isn't that niche. Probably in second behind "soda" pop being in third place. Some areas have other names like "cold drink" that while seeming generic actually only refer to carbonated sweet beverages.
I don't think this is even true for most of the USA, much less the world. I've never heard anyone refer to anything except a cola as "coke" although I heard that was the vernacular in some subset of the US... some southern US states?