I'm pretty sure it's called 'the English language'.
So yeah, ours.
On the basis of what? The fact that you weren't the originator of the language? As far as I'm concerned, both the US and India have more of an English speaking population than the UK so if we're talking about which country it belongs to, then get in line. You just sound like a fool.
At any rate, I believe the US is the best country on Earth because I have my liberties, it's almost always peaceful here (depending on what your definition of peaceful is) and I feel safe living here. Plus, I have all the opportunities I could ask for. Sure, this country has its problems, but what country doesn't in this day and age?