Oracle CDD/Repository provides Japanese CDO help and error messages.
  To use Japanese CDO help and messages, assign the following logical
  names:

        Logical Names For Japanese CDO Help and CDO Messages
  -----------------------------------------------------------------
                      Logical Name      Equivalence Name
  -----------------------------------------------------------------
     Help:            CDO$HELP          SYS$HELP:JCDO$HELP
     CDO messages:    CDO$MESSAGES      SYS$MESSAGE:JCDO$MESSAGES
  -----------------------------------------------------------------

  When you read Japanese CDO messages, set the character_set of your
  session to DEC_KANJI using the CDO SET CHARACTER_SET command;
  otherwise, some Japanese messages may not display correctly.

  To read Japanese help and messages you must use a Japanese virtual
  terminal, or use Japanese DECwindows, which provides a Japanese
  terminal emulator.

  To read English CDO help and CDO messages, deassign the logical names
  or assign the following logical names:

       Logical Names For English CDO Help and CDO Messages
  -----------------------------------------------------------------
                     Logical Name      Equivalence Name
  -----------------------------------------------------------------
    Help:            CDO$HELP          SYS$HELP:CDO$HELP
    CDO messages:    CDO$MESSAGES      SYS$MESSAGE:CDO$MESSAGES
  -----------------------------------------------------------------