alt Hacker NewsI think you're right that working in certain areas (geographical or professional) gives you an ability to grasp all kinds of English.
I've worked in universities and in tech, in New Jersey, LA, and Silicon Valley, and I feel like I can understand just about anyone's English.
Ironically, the ones I have the hardest time understanding are almost always Brits.
Yep, a common anecdote from European science conferences is that by the second day, everybody do settle into the thick, averaged Spanish/German/French/Italian/Russian accent of their English which is pretty much equally understandable to everyone present except from the actual guys from Oxford, England.