Syntax:  CHECK LANGUAGE DEFINITIONS defined_language

  Analyzes the definitions associated with a language and reports
  errors.

  This command detects and reports the following informa- tion:

                o  Undefined tokens-An undefined token appears in a menu
                   placeholder body.

                o  Undefined placeholders-An undefined placeholder appears
                   in the body of a token, or a nonterminal or menu-type
                   placeholder; or it is referenced by an alias-type
                   placeholder or token; or it appears as the value of
                   the token or placeholder help topic.

                o  Unreferenced placeholders-A placeholder has been
                   defined that does not appear in the body of any token,
                   nor is it referenced by any alias type tokens or
                   placeholders.

                o  Routines with the same name as tokens-A token name
                   conflicts with the name of one of the routines in a
                   package associated with the language.

                o  Parameters with the same name as placeholders-A
                   placeholder name conflicts with the name of a routine
                   parameter in a package associated with the language.

                o  Routines and parameters defined with the same name in
                   multiple packages associated with the language.