Gotcha. So, aside from failing to install dependencies, I'm not sure how to recreate the errors posted above. The particular issue you described hasn't manifested itself in anything I've run on my end. Whether its expected behavior or not, those constants seemed to work as they are in all my tests.

At the moment, my money is on something related to certain platforms & specific version of Perl, since the CPAN Testers report lists a whole bunch failures under Perl 5.14 on various flavors of BSD all due to the same error listed above - ("Bareword "Locale::Codes::Language::LOCALE_LANG_ALPHA_3" not allowed")

The good news is the latest version of Wiktionary::Parser no longer has those errors in the latest testers report. The bad news is now there's a different error in there... I'll try to wrestle with this one in a bit.