This looks great! Would it be possible to make a modified version that lists description edits in a particular language (instead of sitelink edits for a particular project)? This should be very useful for targeted patrolling too; it came up as a suggestion in the Wikidata project chat last week.
Technically, it should be a relatively simple change, querying for "wbsetdescription" instead of "wbsetsitelink-remove".
(More generally, there is
https://phabricator.wikimedia.org/T141866 "Provide a way to filter Wikidata's recent changes for language-dependent content in specific languages", but that looks like a larger project.)