Um, I think you'll find the actual order (at least for FC4) is going to be:
C, C++, Python, Perl. Almost all of the Fedora GUI system tools are Python. There are very, very few progams that are built using Perl. automake and autoconf are the biggest ones. foomatic also uses perl and I think libtool.
Don't get me wrong, there are a lot of packages that require perl, but most of these are perl modules and not applications.
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