Problem: When one't watchlist is set to display edits made on linked statements on Wikidata, they are always displayed in numerical code even if labels exist on the Wikidata entries. For example, this diff on enWikipedia's watchlist displays as "Created claim: Property:P4552: Q5456; Added reference to claim: Property:P4552: Q5456" whereas on Wikidata it's two diffs with two edit summaries, "Added reference to claim: mountain range (P4552): Andes (Q5456)" and "Created claim: mountain range (P4552): Andes (Q5456)".
Who would benefit: People who use their watchlist on a non-Wikidata project to monitor changes to the Wikidata item linked to an article they have watchlisted. On enWikipedia some templates draw information from Wikidata so making it easy to monitor the edit content may be beneficial.
Proposed solution: The watchlist should display the language label if it does exist in lieu of the numerical code; in this case the summary should be "Created claim: Property:mountain range: Andes; Added reference to claim: Property:mountain range: Andes" perhaps with the "property" omitted if it makes the summary overlong.
More comments: I hope I didn't send this in too late.
Phabricator tickets: phab:T108688; phab:T171027 may be worth paying attention to since it's a technical issue that could impact on this project.