Seriously. I was like "okay, Brazil is in the right general area, but obviously the wrong shape. Argentina is definitely not there. Chile is along the coast, so I'll allow it. I honestly couldn't say what all the northern countries are, and... wait, what the hell is the north connecting to, that looks like the middle east.
Mexico, you say? Pretty sure if Yakko saw this, he wouldn't start singing about countries. He'd just give the camera a disapproving head shake and say "I give up. You kids are on your own. Public schooling clearly isn't helping..." and walk off screen.
I learned recently that the theme park "six flags" is short for six flags over Texas. One of those flags is the Confederate flag. They are celebrating being under the Confederate flag...at a theme park.
To be fair it's nowhere near the normal lost cause stuff. The other flags are Spain, Mexico, France, Texas, and the United States. They aren't specifically calling it out, it's just there, as one of the flags that flew over Texas.
If you'd zoomed out a little more you could've included Ibiza to the north, where the Mayans started out before expanding north towards disneyland, or the Azores to the west, the base used by the Polynesians to obtain sweet potatoes from the Ghanaians.