You can copy and paste the lists of rel-cats into the box for editing links to alternate languages; after removing the numbers (..) you will quickly have a lot of alternate language links. Remember to remove your own language from the list.
However, editors can forward missing language links in the format http://dmoz.org/World/Lingua_Latina/Scientiae/Ius/Ius_Romanum (from your Bookmarks).
For changes, additions, or corrections to the Society equivalents, please contact editor choster.
If your site has different versions for different languages, please submit only the url for a given language in its respective World category.