Trivial wish(/bug?) in about dialog

[Xan]

I think that in about dialog is missing information about what language 
translate each translator that appears in it.

The inclussion of the language who translates help anyone to submit a 
translation bug. By this way, any desktop user who have xfce4 in a specific 
language could contact to translator directly.

Thanks,
Xan.

PS: Perhaps it's missing in web page too.