Hello Shirayuki,
I hope to find you in good health during this curious period. In Help:Substitution, I added the links to English Wikipedia by w:en:The_page_link
, because some of these links were previously in red. But I added "en" on purpose, putting myself from the translator's point of view, even if this approach takes up more space. It was an incentive to find a link like w:fr:The_same_page_in_another_language
or w:hi:This_language
. What do you think ? Of course, when the link is in a translation variable, there is no need to add "en".
Also, when you add "(in English Wikipedia)", you may have seen my translations as well. For example, w:Help:Parameter default is currently the only existing page, hence the additional precision.
Best regards