I actually find the Leica user stereotype quite funny actually. In fact I do take the piss out of the doctors (wait, it's dentists) that take amazingly sharp yet poorly composed and bland photography with their ten thousand dollar set-ups. It's part and parcel of being seen as a premium brand. But rest assured, I
do know how to take photographs. I shoot with a Leica firstly because I enjoy the pared down simplicity of a rangefinder, and secondly, in camera terms it's actually rather cheap - I can't think of any other brand where a film camera actually appreciates in value over time, so if I decided that the whole rangefinder thing wasn't for me (however it is) I could actually sell my M setup on for a profit. I shoot different formats and brands, I love photography, Leicas are excellent photographic tools, ergo I use them.
As for the English thing, not really. The spread of English across the globe as a language was directly because of the British colonising activities in the 17/18th century. Later generations were taught English as it was an institutional thing. Novels were written by members of those colonies. Those novels spread.The ubiquity of the language today is symptomatic of the wide reach the British Empire had. Plus we had the biggest bands in the world in the 20th century, and I'd argue that penetration into foreign popular culture has a much larger effect on the proliferation of a language than economic clout. Statesmen would have been educated in English anyway.