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Map of languages in West Africa.
(images2.imgbox.com)
The data is quite old, so the number of speakers has probably increased drastically since then. Still, I guess that the proportions and geographical distribution should be more or less the same today.
Very cool! Thanks for sharing.
3D bar chart is a big no-no though.
Other than that this particular one is a bit ugly I don't see an issue here. I agree in other cases its often used to diffuse differences between different sets if data but here its kept relatively simple in my opinion.