Put aliases such as the following in your .cshrc file.
alias kor_EUC "setenv LANG ko; /bin/stty cs8 -istrip defeucw" alias kor_UTF "setenv LANG ko.UTF-8; /bin/stty cs8 -istrip \defeucw" alias asc "setenv LANG C; /bin/stty cs7 istrip defeucw"