Index: openacs-4/packages/acs-lang/tcl/lang-message-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-lang/tcl/lang-message-procs.tcl,v
diff -u -r1.54.2.2 -r1.54.2.3
--- openacs-4/packages/acs-lang/tcl/lang-message-procs.tcl	19 Oct 2015 10:22:38 -0000	1.54.2.2
+++ openacs-4/packages/acs-lang/tcl/lang-message-procs.tcl	19 Oct 2015 17:33:01 -0000	1.54.2.3
@@ -837,6 +837,7 @@
 			    set message $default
 			} else {
                             ad_log Error "lang::message::lookup: Key '$key' does not exist in en_US"
+                            set message "MESSAGE KEY MISSING: '$key'"
 			}
 		    }
                 }