why don't we use a coding language to make a coding language?
we have python, 3 types of c, java script, java, and many more... just run 1 code language to make an extremely powerful code language. (in the end only 2 code languages are being ran)
There is no three types of C. C is only one the other is C++ and C#. Don't go on the character of C. They are different Programming Languages. You are right but every languages syntax and way of working is different so it is not possible to combine all languages in a single language.
I don't know whether there are other languages that can be "combined" like Python.