I am not convinced its a good idea.
On the contrary, my opinion is to move as much as possible to the english section. My point:
Open source is sharing.
We all want to share, help and be helped, but german or italian becomes closed source to me.
Yes, english is another language to learn. So is C, VB... And all help and datasheets are in english.
The best training is trying to try to learn to read and write in english. Google translate helps too.
I dont want to close the internationals, its good to be able to ask for help when its necessary, arranging local meetings and so on.
But if there is going to be changes, why not make these parts as visible only for those who wants to join? Then its not in my top25 new hits to read, and the members can talk about anything the want?