I've patched graphlib so now it's able to find new language specific fonts. Also I've upgraded the central font and now it support some more languages, so I've deleted such specific fonts from language packs.
Anyway, some languages remain not working and they need to have its own font installed (basically, Latin, Cyrillic and Greek are working, the rest will need their own font- see links above).
Hope this was the final solution...ciao