--- etex.src.orig	2015-09-16 14:17:48.263123165 -0400

+++ etex.src	2015-09-16 14:14:20.673610421 -0400

@@ -290,8 +290,10 @@

 \def \addlanguage #1#2#3#4#5% language patterns exceptions lhm rhm

     {\expandafter \et@xlang \csname lang@#1\endcsname

-     \expandafter \chardef \csname lhm@#1\endcsname=#4 % V1.0-1

-     \expandafter \chardef \csname rhm@#1\endcsname=#5 % V1.0-1

+     \def\paramD{#4}\ifx\paramD\empty\def\paramD{1}\fi % Default value lhm is 1 % V2.1-1

+     \def\paramE{#5}\ifx\paramD\empty\def\paramE{1}\fi % Default value rhm is 1 % V2.1-1

+     \expandafter \chardef \csname lhm@#1\endcsname=\paramD % V2.1-1

+     \expandafter \chardef \csname rhm@#1\endcsname=\paramE % V2.1-1

      \uselanguage {#1}%

      \input #2

      \if *#3*\else \input #3 \fi

@@ -776,6 +778,9 @@

 %% Revision-history:

+24-ARP-2015: 2.1;1  Allow empty values on \addlanguages for parameters 4 and 5

+                         Changed by Edgar Hoch

+

 01-FEB-1999: 2.1;0  Allow file to be used with e-TeX versions 2.0 and 2.1

 25-MAR-1998: 2.0;19 Improved log message for \{glob|loc}{marks|box}vector (PEB)