countries they are the same, for example "de" for Germany. However Czech is
special. Accorning to this article (in Czech, sorry) we have "cs" for Czech
language (from "cestina", the name of the language in Czech) and "CZ" for
the region code, meaning country Czech Republic:
http://zencart-solutions.palek.cz/cs/cestina-na-webu/cs-nebo-cz.html
I thought I better fix it before I start translating more pages.