Hello David IGN, the "Multilingual options" only appears if the "Menu Translation" module (part of i18n) is enabled. If it isn't, enable it and run the update script. If it is, disable it and flush all caches. Then enable it again and don't forget to run the update script. After this, when you go to 'admin/structure/menu/add', you should see the Multilingual options fieldset. Cheers!