Index: openacs-4/packages/xowiki/tcl/xowiki-form-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/xowiki-form-procs.tcl,v
diff -u -r1.147.2.25 -r1.147.2.26
--- openacs-4/packages/xowiki/tcl/xowiki-form-procs.tcl	13 Jul 2022 10:41:43 -0000	1.147.2.25
+++ openacs-4/packages/xowiki/tcl/xowiki-form-procs.tcl	5 Sep 2022 14:10:56 -0000	1.147.2.26
@@ -283,7 +283,10 @@
       # predates form-fields and follows ad_form conventions and uses
       # upvar, etc.
       #
-      set nls_language [$data form_parameter nls_language [$data form_parameter _nls_language en_US]]
+      set nls_language [$data form_parameter nls_language [$data form_parameter _nls_language]]
+      if {$nls_language eq ""} {
+        set nls_language en_US
+      }
       set name [$data build_name -nls_language $nls_language]
     }
     if {$name ne ""} {