[ryanmolden]

>still I have a hard time believe a 30,000 employee company would not use many more languages internally in some capacity.

There are likely uses of other languages internally for small projects or one-off kind of things, but large companies generally prefer some standard practices/patterns/languages. For well written code, you have to realize, your code will likely outlast your employment. That means someone must maintain it, fix bugs, augment its functionality, etc... It is MUCH easier to manage that whole flow with strict(ish) stylistic standards (Google has these) and a small range of possible languages. If you've ever seen code written 15 years ago in the (then) language du jour, with no sort of consistent/recognizable style/coding patterns, etc.. you will understand why companies do this kind of thing.