You still seem to be using your personal terms as if they were universal terms.
Clark Kent is not a universal term for language skills. Kal-L is not a term meaning "logic and reasoning". That might be what you think of when you hear/read the terms but it isn't the same thing everyone else thinks. And the quote "Clark is who I am, Superman is what I can do" certainly isn't meant to be understood as the character saying he is only "language skills and search for truth" or that Clark is rejecting logic and reasoning because he doesn't use the term Kal-L.