silva-extra metadata language field

dear developers

i stumbled about the note below in the latest history.txt of silva in  
the cvs:

   "The silva-extra metadata set now has a language field that
   stores a ISO 639 two letter language code."

i guess that this feature was introduced to make it easier to have  
multilanguage sites. but i wonder if AutoTOC and table of contents  
also respect this new feature. i mean, can i configure them to show  
only documents of a certain language or all? looking through the code  
(http://cvs.infrae.com/Silva/tocfilter.py?rev=1.1&view=auto) i see  
that this is not implemented yet. do you plan to do so?

regards,
marc