[Menge]

Formally defining is always tricky. For example, I hate seeing "C/C++" and would assume by proxy of the equally absurd but rarely used "C/Objective-C" that I have magically become a C/Objective-C/C++ programmer.

I would consider a polyglot as able to express a full domain of ideas in multiple languages. (For example, knowing latin for biology or religious recitation doesn't make you a normal polyglot, while being able to use it at the breakfast table does.)

So, only if you are one of the few who regularly enjoys the thrill of forcing SQL to do your general computations, would it count in my book towards making you a polyglot in the context of general purpose computing. Similarly, how you choose to use shells would determine whether they count and whether they are each distinct.