I started a few days ago an update to the wikis and you can try it at wikisandbox.kde.org. More details are available at https://phabricator.kde.org/T2442. Could you take a look and provide feedback?
Just a note: translations are impossible after the update. Any change cannot be saved wit an error message:
This namespace is reserved for content page translations. The page you are trying to edit does not seem to correspond any page marked for translation.
Thanks in advance for fixing this issue.