This message is also used as checkbox label on Special:Watchlist, and its $1 is empty.
About Japanese translation, the checkbox label "Wikidataを" is inconsistent with other labels and is incorrect.
Correct translations:
- "Wikidataを表示” (with "show" link)
- ”Wikidataを非表示" (with "hide" link)
- "非表示: ... □Wikidata" ("hide:" and checkboxes)
URL: https://translatewiki.net/wiki/MediaWiki:Wikibase-rc-hide-wikidata/en