This is more a proof-of-concept for your own feincms.module.Base subclasses than a polished or even sufficient blog module implementation.
It does work, though.
Entry(id, published, title, slug, published_on)
This extension adds a language field to every blog entry.
Blog entries in secondary languages can be said to be a translation of a blog entry in the primary language (the first language in settings.LANGUAGES), thereby enabling deeplinks between translated blog entries.