Did you try with the aolserver version that includes the i18n patches - 3.3+ad13? Download link is here:
https://openacs.org/doc/openacs-4/aolserver.htmlReading euc-kr encoded tcl/adp files might work in this version (I know that it works with iso-8859-1 at least).
The patches are going to be included in newer versions of aolserver but I think the safest bet is still 3.3+ad13 as for now.