Facebook has a very extensive Python codebase as well. 21% of all backend code is Python:
https://code.facebook.com/posts/1040181199381023/python-in-p...
https://code.facebook.com/posts/1040181199381023/python-in-p...
Calling scripting/shell/utility for "backend" might give wrong ideas to certain crowds who might have thought that backend is more important than front end product sensitive code that 1Billion users interact with everyday.