In the ebuild, we have src_prepare() { # the default should be classique+reforme1990 # renaming to fr_FR mv fr-classique+reforme1990.aff fr_FR.aff || die mv fr-classique+reforme1990.dic fr_FR.dic || die # move the hyphen/thes to common used name # versions determined from README files mv hyph_fr.dic hyph_fr_FR_v3.dic || die mv thes_fr.dat th_fr_FR_v3.dat || die mv thes_fr.idx th_fr_FR_v3.idx || die } Here, fr-<something> is renamed to fr_FR-<something>, suggesting that this is for French (the country) locales. However, these spellings are essentially used world-wide, not just in France, so the region indicator should not be included.
Closing, as it will be dealt with in Bug 607084, if it is dealt with at all.