Symphony.

Has anyone implemented, or tried to build extensions for integrated multilingual publishing, where readers can translate -with tools- your entries and save them as to be reviewed translations? There is an interesting article here about it.

While GTK doesn’t offer ‘saving of translations as entries’ (only for wikipedia and knoll, the best you can do is ask translators to share the translation with the admin) it seems that worldwidelexicon, a similar toolset, does. It even has plugins for wp and drupal.