Put aliases such as the following in your .profile file.
alias twn_EUC "export LANG=zh_TW; /bin/stty cs8 -istrip defeucw" alias twn_BIG5 "export LANG=zh_TW.BIG5; /bin/stty cs8 -istrip \defeucw" alias asc "export LANG=C; /bin/stty cs7 istrip defeucw" alias twn_UTF-8 "export LANG=zh_TW.UTF-8; /bin/stty cs8 -istrip defeucw" |