I believe the standard Help link indicators do usually point to this wiki by default, but they're contained in normal interface strings so local wikis can override them - I guess T224816 could best be solved by making the default link point to a very short page here (perhaps the page you're drafting), and then change the Enwiki link to point locally.
(For example, see how they've done it at w:en:MediaWiki:Search-helppage which changes the link in search results. However this is also a bad habit in some cases, because it can lead to badly-forked/outdated local docs :-( This example being a case-in-point, because I personally always want the more detailed info at Help:CirrusSearch on this wiki! >.<)
But to briefly repeat myself, my main concern is wasting any time of translators, so just don't write any extensive docs here (yet!), but a short page is probably good. HTH!