I wonder the same. I think a language like pascal is more semantically rich than C-like languages. Something like:

   unit a;

   interface

     function bar(something: Integer): Integer;

   implementation

     uses b;

     var
       foo: Boolean;

     function bar(something: Integer): Integer;
      begin
        repeat
           Result := b.code(something);
        until Result <> 0;
      end;

    end.

Probably holds more semantically significant tokens than the C-counterpart.

But with LLM's the problem's gotta be training data. But if there was as much training data in Pascal as there is in C it would be pretty cool to see benchmarks, I have a hunch Pascal would do better.

(Sorry for the bad pascal I haven't programmed in ages)