getting a list at build time of supported languages ?

[Caolán McNamara]

I suppose we don't have a current mechanism to get a list a build time
of all the languages that we support in the UI as options for setting
the language ?

i.e. I'd like to be able to e.g. filter the libexttextcat language
fingerprints to only install the ones which are usable by us. I got a
little carried away with additional language support and ran quite a bit
ahead of the languages we support.

C.