Odd take. It seems perfectly natural that the country using different sizes from everybody else would be aware of that fact, but that a country using the same size as 95% of the world might not know about the weirdo sizes used by those 5%.

Fair but if you’re going to diss, at least be aware it’s not just one country :) (I’ve never lived in the country you’re thinking of, and all the countries I’ve lived in use non-ISO216 paper sizes).