Syntax:  SET LANGUAGE FILE TYPES text_string add_remove
              defined_language

  Specifies a file type that is valid for the language being defined.

  When LSE reads a file into a buffer, it sets the language for that
  buffer automatically if it recognizes the file type.  For example, a
  Fortran file type (.FOR) sets the language to Fortran.  Note that the
  period character must be included with the file type.

  RELATED COMMANDS:

     EXTRACT LANGUAGE            SHOW LANGUAGE
     NEW LANGUAGE