I noticed that a MW instance with WikiBase client installed shows the link Wikidata item in the "Tools" section of the SideBar.
This is not correct as the link does not actually point to Wikidata, but to the local Wikibase installation.
Using ?uselang=qqx I found out the message showing that text is wikibase-dataitem, which in turns takes the name of the repository from Wikibase-repo-name: in fact this message contains the word Wikidata.
I would suggest to replace this last Wikidata with Wikibase: do you see any potential issue in making such a change?
If not, I need to ask guidance on where to make the modification: is https://translatewiki.net/wiki/MediaWiki:Wikibase-repo-name the right place to change the content?