They're not limiting themselves to C++. But, view it from a different perspective: 1) C++ is a superset of C (to some extend, this isn't 100% true, but most co

They're not limiting themselves to C++. But, view it from a different perspective: 1) C++ is a superset of C (to some extend, this isn't 100% true, but most concepts in C are applicable to C++) 2) If you know C++, it is a little bit easier to grok Java 3) I heard most of their back-end stuffs are written in C++ I also read news about Google being a huge Python company. But to be honest, I haven't heard a product that they shipped that is written in Python. Python is big internally where they need tools to support their development. PS: - GAE library does not count as their product - Exclude YouTube because they chose Python on their own