diff --git a/extension.json b/extension.json
index ae58d4f0a..19dd2a8b0 100644
--- a/extension.json
+++ b/extension.json
@@ -358,6 +358,7 @@
 		"Cite\\Tests\\": "tests/phpunit/"
 	},
 	"TrackingCategories": [
+		"cite-tracking-category-cite-diffing-error",
 		"cite-tracking-category-cite-error",
 		"cite-tracking-category-ref-extends"
 	],
diff --git a/i18n/en.json b/i18n/en.json
index 3302a4ce4..9af0a9e6a 100644
--- a/i18n/en.json
+++ b/i18n/en.json
@@ -38,6 +38,8 @@
 	"cite_error_empty_references_define": "<code>&lt;ref&gt;</code> tag with name \"$1\" defined in <code>&lt;references&gt;</code> group \"$2\" has no content.",
 	"cite-tracking-category-cite-error": "Pages with reference errors",
 	"cite-tracking-category-cite-error-desc": "Pages in this category have errors in the usage of references tags.",
+	"cite-tracking-category-cite-diffing-error": "Pages with reference errors that trigger visual diffs",
+	"cite-tracking-category-cite-diffing-error-desc": "Pages in this category have errors in the usage of references tags, and these errors are not rendered in the same way in the legacy parser and in Parsoid.",
 	"cite-tracking-category-ref-extends": "Pages that use extended references",
 	"cite-tracking-category-ref-extends-desc": "Pages in this category use the \"extends\" attribute of the &lt;ref&gt; tag.",
 	"cite-reference-previews-reference": "Reference",
diff --git a/i18n/qqq.json b/i18n/qqq.json
index 560c3ce66..74fb28a66 100644
--- a/i18n/qqq.json
+++ b/i18n/qqq.json
@@ -43,6 +43,8 @@
 	"cite_error_empty_references_define": "Error message shown when there is a <code>&lt;ref&gt;</code> inside <code>&lt;references&gt;</code>, but it does not have any content, e.g.\n<pre>\n<references>\n<ref name=\"foo\" />\n</references>\n</pre>\nParameters:\n* $1 - the <code><nowiki>name</nowiki></code> of the erroneous <code>&lt;ref&gt;</code> (in the above example, “foo”)",
 	"cite-tracking-category-cite-error": "{{tracking category name}}\nTracking category name.",
 	"cite-tracking-category-cite-error-desc": "Tracking category description.",
+	"cite-tracking-category-cite-diffing-error": "{{tracking category name}}\nTracking category name for pages with reference errors that trigger visual diffs.",
+	"cite-tracking-category-cite-diffing-error-desc": "Tracking category description for pages with reference errors that trigger visual diffs.",
 	"cite-tracking-category-ref-extends": "{{tracking category name}}\nThe [[:mw:Special:MyLanguage/Help:Tracking categories|tracking category]] to add to the article if it uses <code>&lt;ref&gt;</code> tags with an <code>extends</code> attribute.",
 	"cite-tracking-category-ref-extends-desc": "Description of the <code>extends</code> feature tracking category. (See {{msg-mw|Cite-tracking-category-ref-extends}}.)",
 	"cite-reference-previews-reference": "Default heading for popups that show previews of references as provided by the Cite extension's <ref> tags (also known as footnotes).\n{{Identical|Reference}}",