Board Thread:General Discussion/@comment-24431687-20151013023312/@comment-168424-20151014151451

Shining-Armor wrote:

1. Interwiki templating is only to be done for user page templates only

3. You can only use interwiki templating with user pages

Not quite true. Wikia staff created templates can be interwiki transcluded. There also might be some grandfathered non-user page templates also that turned out to be commonly useful.