Can you guess the Mystery Capital City ? To make a letter appear in the "Mystery Capital" section, you need to type a (national) capital city that contains the same letter in the same place. Good luck !
You can type in any national capital city, even if it doesn't have the same number of letters as the one to find.
When typing a capital, its letters will appear in the "Found Letters" section. If a letter stays grey after typing a capital with that letter in it, that means that it's not in the Mystery Capital. If it goes white however, it is. You'll then have to find where exactly !
Diacritics are not taken into account, so letters with them are considered the same as letters without.