I get the Imperialist connotation, but I still think English would be best because it’s just so widespread. I’ve traveled quite a bit and it seems most everywhere people speak at least a little bit of English. It also has far more
Coming back to mz's initial take, though, I also often think about this. Just the idea of being able to communicate with everyone in a language you're fluent in, no matter where you are in the world is so sexy.
That is kinda what I'm talking about. Like I wouldn't be able to explain how pluralization works other than instinctively knowing what's the right plural for each case by case word. English slapping an "s" at the end is a breeze.