diff --git a/400_xowa/src/gplx/xowa/addons/wikis/ctgs/htmls/pageboxs/doubles/Xoctg_double_box__tst.java b/400_xowa/src/gplx/xowa/addons/wikis/ctgs/htmls/pageboxs/doubles/Xoctg_double_box__tst.java
index cb84241c6..c015f3f7b 100644
--- a/400_xowa/src/gplx/xowa/addons/wikis/ctgs/htmls/pageboxs/doubles/Xoctg_double_box__tst.java
+++ b/400_xowa/src/gplx/xowa/addons/wikis/ctgs/htmls/pageboxs/doubles/Xoctg_double_box__tst.java
@@ -31,7 +31,7 @@ public class Xoctg_double_box__tst {
 		,	      "</li>"
 		,	    "</ul>"
 		,	  "</div>"
-		,	  "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks mw-hidden-cats-user-shown\">Hidden categories:"
+		,	  "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks mw-hidden-cats-user-shown\">Hidden category:"
 		,	    "<ul>"
 		,	      "<li>"
 		,	        "<a href=\"/wiki/Category:A\" title=\"Category:A\">A</a>"
diff --git a/400_xowa/src/gplx/xowa/addons/wikis/ctgs/htmls/pageboxs/doubles/Xoctg_double_grp.java b/400_xowa/src/gplx/xowa/addons/wikis/ctgs/htmls/pageboxs/doubles/Xoctg_double_grp.java
index ce4d22cea..5697c039f 100644
--- a/400_xowa/src/gplx/xowa/addons/wikis/ctgs/htmls/pageboxs/doubles/Xoctg_double_grp.java
+++ b/400_xowa/src/gplx/xowa/addons/wikis/ctgs/htmls/pageboxs/doubles/Xoctg_double_grp.java
@@ -36,7 +36,7 @@ public class Xoctg_double_grp implements Bfr_arg {
 			Fmt__normal.Bld_many(bfr, lbl_ctg_help, lbl_ctg_text, itms);
 		}
 		else {
-			byte[] lbl_hidden = wiki.Msg_mgr().Val_by_id_args(Xol_msg_itm_.Id_ctg_tbl_hidden, count);
+			byte[] lbl_hidden = wiki.Msg_mgr().Val_by_id_args(Xol_msg_itm_.Id_hidden_categories, count); // use "hidden-categories" instead of "hidden-category-category" ISSUE#:674 DATE:2020-03-04
 			Fmt__hidden.Bld_many(bfr, lbl_hidden, itms);
 		}
 	}
diff --git a/400_xowa/src/gplx/xowa/langs/msgs/Xol_msg_itm_.java b/400_xowa/src/gplx/xowa/langs/msgs/Xol_msg_itm_.java
index 5f3834c0a..cab7b402e 100644
--- a/400_xowa/src/gplx/xowa/langs/msgs/Xol_msg_itm_.java
+++ b/400_xowa/src/gplx/xowa/langs/msgs/Xol_msg_itm_.java
@@ -252,8 +252,9 @@ public static final int
 , Id_xowa_wikidata_links_special = 231
 , Id_xowa_window_allpages_box_tooltip = 232
 , Id_xowa_window_allpages_btn_tooltip = 233
+, Id_hidden_categories = 234
 ;
-	public static final int Id__max = 234;
+	public static final int Id__max = 235;
 	public static Xol_msg_itm new_(int id, String key, String val) {return new_(id, Bry_.new_u8(key), Bry_.new_u8(val));}
 	public static Xol_msg_itm new_(int id, byte[] key, byte[] val) {
 		Xol_msg_itm rv = new Xol_msg_itm(id, key);
@@ -512,6 +513,7 @@ case Xol_msg_itm_.Id_xowa_wikidata_deprecated: return new_(Xol_msg_itm_.Id_xowa_
 case Xol_msg_itm_.Id_xowa_wikidata_normal: return new_(Xol_msg_itm_.Id_xowa_wikidata_normal, "xowa-wikidata-normal", "normal");
 case Xol_msg_itm_.Id_xowa_wikidata_preferred: return new_(Xol_msg_itm_.Id_xowa_wikidata_preferred, "xowa-wikidata-preferred", "preferred");
 case Xol_msg_itm_.Id_xowa_wikidata_links_special: return new_(Xol_msg_itm_.Id_xowa_wikidata_links_special, "xowa-wikidata-links-special", "Links (special wikis)");
+case Xol_msg_itm_.Id_hidden_categories: return new_(Xol_msg_itm_.Id_ctg_tbl_hidden, "hidden-categories", "{{PLURAL:~{0}\u007CHidden category\u007CHidden categories}}");
 			default: throw Err_.new_unhandled(id);
 		}
 	}