Another thing which isn't quite straightforward is i18n of pages and page names. Is this out of scope or did you think about it, too?
I'm not very hot on the idea of i18n of page names. I think that creates more problems than what is worth, since you will then need to have an "abstract" name and a "real" name, and then you need to prevent creation of pages with the "abstract" name, and so on.
But it should be easy enough to add a new Property which defines what language the page is in.
/Janne
