TL;DR
There must be a simple way to get the item a page previously was connected to, even if it was removed from that item. Otherwise it is very hard to revert such a removal, and in an open system it is very important, that reverts are (almost) as easy as changes.
Reproduce
From the client's perspective it is almost impossible to restore deleted language links. As an example, this happened to me some days ago:
- I saw a change to [[de:Lateinische Zeichen in Unicode]] on my watchlist, and visited the article to view it.
- I more or less accidently found the language links missing.
- I tried to use Special:ItemByTitle to find the item and restore the links, but no item was found.
- I went to [[en:Latin script in Unicode]] to get the item/links from there, but they were missing there, too.
- I had to change my watchlist to "simple" to see the Wikidata changes there, and had to go through the old changes to find the one change that diconnected the de-article from its Wikidata item. If this had happened 30 days ago, the change would no longer have appeared there.
Version: unspecified
Severity: minor