As an American who visited all those countries and conversed with multiple citizens from each of those countries, they do remind you of the "Central Europe" thing..

However, they don't understand that for Americans, "Eastern Europe" isn't geographic; it's geopolitical... essentially, Europe east of the former Berlin Wall

There's South America the continent, but for some Spanish people (and possibly other peoples), "South America" is everything south of America (starting with Mexico)

I am from México, and came here to comment because the posted website says "Mexico is part of Central America", and well, No. México is definitely, absolutely, unequivocally in North America.

Which Spanish people? No one in Latin America(or for that matter in Spain) use your weird definition for South America.For classifying America or the Americas there are 2 different models: the 2 continent model (that Anglo people use among others) and the 1 continent model that we use in Latin America. In neither of those 2 models Mexico is considered a part of South America.

But that's it! We hate to be connected with former Soviet eastern block. Therefore it's even more important for us to be considered and called Central Europe ;)

Yes all these continents, countries, regions, subregions are very confusing

Very useful feedback. Will add it.