Index: openacs-4/packages/acs-tcl/tcl/defs-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/defs-procs.tcl,v
diff -u -N -r1.77 -r1.78
--- openacs-4/packages/acs-tcl/tcl/defs-procs.tcl	25 Jul 2018 17:49:26 -0000	1.77
+++ openacs-4/packages/acs-tcl/tcl/defs-procs.tcl	27 Jul 2018 09:36:20 -0000	1.78
@@ -290,13 +290,16 @@
     access-control filters that determine whether a user has
     permission to request a particular page.
 
-    Title and explanation is optional. If neither is specified,
-    then a default "Permission Denied" message will be displayed.
+    Title and explanation are optional. If 'title' is not specified,
+    then a default localized system message will be displayed. If
+    'explanation' is not specified, it will default to the title.
 } {
-    if { $title eq "" && $explanation eq "" } {
-        set title "Permission Denied"
-        set explanation "Sorry, you haven't been given access to this area."
+    if { $title eq "" } {
+        set title [_ acs-subsite.403_message]
     }
+    if { $explanation eq "" } {
+        set explanation $title
+    }
     ad_return_exception_page 403 $title $explanation
 }