You misunderstand me: I'm not claiming its "mostly C++", I'm claiming that its "mostly C++ and Java". Python isn't zero, but its very far down the list, both in lines of code and machine cycles spent.

Certainly, although you can work there using almost entirely python (I did for two years, although I'm now having to use more and more c++ and java as my work shifts to be infra that involves products instead of just raw infra)