Guide to interwiki linking

An interwiki link is a unique link that takes users from one wiki to another. For instance, the Miraheze Commons' main page is linked to by. An interwiki map, which is a list of target wikis or websites together with their prefixes, is provided for each wiki. These target wikis or websites don't even have to be wikis or use MediaWiki.

Preface
Interwiki links are internal-style links to other websites (which do not have to be wikis, despite the name). For example, you can link to the article https://simple.wikipedia.org/wiki/Baby by typing. It will result in a link simple:Baby. This works because Miraheze Meta-Wiki configures simple: as an "interwiki prefix" that turns into https://simple.wikipedia.org/wiki/ when used inside. Interwiki links, in contrast to internal links, do not use page existence detection, so they will still display as blue links even if the page in question does not exist on the destination wiki.

You can build piped links, which are similar to internal page links but have a different link label, for example,  is the link Cute baby and   is the link Baby.

Basically, interwiki links are abbreviations for commonly-used longer external links. A very similar link could be created as Cute baby.