/etc/texmf/sitemlcode.tex is in multex-base 1.0-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | % Set up site-default multi-lingual code
%
% 8bit char is regarded as japanese EUC
\defmlinputcode{1}{\mcsascii}{\mcsjp}
% no 8bit output
\defmltermcode{1}{\mcsnone}
\defmllogcode{1}{\mcsnone}
\defmlwritecode{1}{\mcsnone}
%
\defmlinputmcs1`J\mcsascii
\defmlinputmcs3`@\mcsjp
%\defmloutputfin\mcsroman`B
%\defmloutputfin\mcsjpold`B
|