Guess the top 50 capitals by their metropolitan populations;
Primary source: https://www.macrotrends.net/cities/largest-cities-by-population;
There is a map error with Greece, Zambia, and North Korea's capitals (Greece's should be bigger and Zambia's & North Korea's should be switched);
Why is Taipe accepted for Taipei? I would remove it as a type-in because it causes an extra 'i' to be left over. (This happens with Riyadh too, but that one is a standard type-in, so I think it's fine as is.)