Syntax:  SET LANGUAGE HELP LIBRARY file_spec defined_language

  Specifies the HELP library where you can find help text for
  placeholders and tokens defined in this language.

  On OpenVMS systems, LSE uses the default file specifica- tion
  SYS$HELP:HELPLIB.HLB.  On Ultrix, it uses /usr/lib/lse
  /env/language_name.hlp.  If you want to access some other HELP
  library, you must supply an explicit device name.