Thread:Mira84/@comment-1590788-20130402120740/@comment-3030984-20130402163909

Story time! :)

Once upon a time, harrypotter and de.harrypotter were linked together, and all was well on the servers. Then, one day, harrypotter decided to change their German link to de.harrypotter. While this changed the German link on harrypotter, it didn't remove the English link on de.harrypotter. So, there is now a broken link. It shouldn't be there, as it causes cross-wiki navigational issues. Interwiki links are meant to come in pairs.

The technical limitation I refer to is the fact that the language code (de or en in this case) is used to make interwiki links work. Adding Harry Potter to a page on harrypotter will create an interwiki link with the Harry Potter article on de.harry-potter. Hence, two wikis of the same language code can't be linked to harrypotter.