diff --git a/module_citeq.lua b/module_citeq.lua
index d901bb6..aa55ac2 100644
--- a/module_citeq.lua
+++ b/module_citeq.lua
@@ -1150,7 +1150,7 @@ local function cite_q (frame)
 	-- QID as normal form; emit error if not ^Q%d+$ (e.g. a Wikidata URL)
 	local qid_form = mw.ustring.match(mw.text.trim(args.qid), "^Q%d+$") or nil
 	if not qid_form then
-		return ' <span class="error" style="font-size:inherit"><code class="cs1-code">{{[[Template:Cite Q|Cite Q]]}}</code>: QID parameter must be supplied as "Q" followed by digits, e.g. <code class="cs1-code">Q12345</code> ([[Template:Cite Q#Error messages|help]])</span> '
+		return ' <span class="error" style="font-size:inherit"><code class="cs1-code">{{[[Template:Cite Q|Cite Q]]}}</code>: QID parameter must be supplied as "Q" followed by digits, e.g. <code class="cs1-code">Q12345</code> ([[Template:Cite Q#Error messages|help]])</span> ' .. cfg.i18n_t.trackingcats["invalid-qid"]
 	end
 
 	local cites = {}
diff --git a/module_citeq_config.lua b/module_citeq_config.lua
index d9d936a..a211f58 100644
--- a/module_citeq_config.lua
+++ b/module_citeq_config.lua
@@ -27,6 +27,7 @@ local i18n_t = {
 	["trackingcats"] = {
 		['expression-of-concern'] = "[[Category:Cite Q - cites a work with an expression of concern notice]]",
 		["erratum"] = "[[Category:Cite Q - cites a work with an erratum]]",
+		["invalid-qid"] = "[[Category:Cite Q - invalid QID]]",
 		["missing-wikidata"] = "[[Category:Articles with missing Wikidata information]]",	-- TODO: point to a {{cite q}}-specific category; this one is specific to Module:WikidataIB
 		['no-label-or-title'] = '[[Category:Cite Q - missing label or title]]',
 		["retracted"] = "[[Category:Cite Q - cites a retracted work]]<!-- retracted -->",