As suggested in #604 there might be some language unnecessary redundancy, for
instance between 'es' (Spanish) and 'es-ES' (Spain's Spanish), but we'll figure
that out during the release candidate phase.
This was proposed in #604, and I now beleive it is actually good to provide
admin/maintainer scripts in the repository.
We still need to clean-up the language list, again as suggested in #604.