Board Thread:General Discussion/@comment-25015152-20140809173714/@comment-1330470-20140809174410

The closest thing there is is an interwiki template.

If you create a template at Template:User:Xermano, as you would any other template, here on Central, you can then transclude it on any wiki, using the syntax.

But you still have to paste that snippet of code into all the wikis you visit.