Template talk:Iw

https://www.mediawiki.org/wiki/Manual:Interwiki

As an alternative to interwiki linking, a template can be created to wrap a plaintext page title into a URL-encoded external link to a known wiki, which can then be called with syntax equivalent to interwiki links.

This preserves the appearance of external links while providing the same convenience as interwiki linking.

<!-- Template:IW --> [https://example.com/wiki/{{urlencode:{{{1}}}|WIKI}} {{{2|{{{1}}}}}}]

Then, instead of [[iw:External Page Title]], call the template:

{{IW|External Page Title}} → External Page Title

{{IW|External Page Title|Alternate text}} → Alternate text