C is pretty small, you don't need to limit yourself to an outdated version. I don't think it changed that much.
Java 7 was the last straightforward version, in Java 8 it got lambdas and all kind of magic like default methods in interfaces.
I can't give advice on Python other than to make sure you avoid Python 2 and focus on Python 3. But it is a mess and every new version introduces some new gimmick that makes things worse. Of course it doesn't even have a standardized version, whatever CPython implements is Python.