I have watched Congressman Keating since his election. He is an strong and dedicated to constituents. I am a Realtor who believes in protecting property rights of homeowners. Congressman Keating understands the housing issues such as Flood insurance, protecting the Mortgage Interest Tax Deduction and other such issues.
Judging for the closed-ness of Apple, you probably won't get much credible answer from Apple's own people. OS X and iOS are primarily written in Objective-C with some C++ in between (e.g. IOKit, WebKit, etc) and probably some C as well for the kernel stuff. However looking at Apple's software engineering jobs vacancies [1], these are also relevant programming languages at Apple: Java.
AppleÂ® HomeKitâ¢ is a common language that smart devices from any manufacturer can understand and support and then control via SiriÂ®, the Apple voice assistant. It is a single way of managing everything, rather than using lots of apps that only do one thing, and is likely to change your home, in a good way, forever.