Validating code you understand, sure. Validating code for a language you don't know, I don't see how you could. E.g. say you speak python, how would you know h

Validating code you understand, sure. Validating code for a language you don't know, I don't see how you could. E.g. say you speak python, how would you know how to cleanup memory in C, since you never had to do it? Would you even know that you have to?