Nice mod. One problem I see is that some of the countries have diacritics in the name, for example, you have

"reunion" => "RE Reunion",
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when it should be

"réunion" => "RE Réunion",
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But there is another problem and that is to change the case of the country name to match against the hash involves a change of case. This change of case like using the uc() function or lc() will not handle the diacritics correctly. You can subtract an ascii 32, and catch most of these, but not all. Another option is to go with the

use utf8;
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But this has some weirdnesses as well. Very useful module, I think it may need to be tweaked a little to handle the weird cases where diacritics appear in the country name.

cheers!
krazken