Very good quiz, but would need a bit more time. My time ran out while I was trying to type – without a clue why – Lester. Maybe I would have cracked that in the end.
The capital of Cape Verde (Praia) is more western than DaKar, so I would suggest to say "Westernmost city of the mainland of Africa" or something like this.
Too many C(h)esters in the UK ;) (blame the Romans)
Currently this is what is needed
9 = 1
13=2
14=3
16=4
20=5