No shit :) I've been traveling the world for the past two years s a digital noamd, lived in both communist Romania and ubercapitalist Silicon Valley, as well as in-between in a bunch of South American countries, European ones, and New Zealand. I've learned French and Spanish in addition to my native tongue and English. I'm not a polyglot, but I think I have broader horizons than most people.

I'm not imposing English (how could I? I'm not a dictator or anything). I'm pointing out how the world would be a better place if everyone understood English.

As for broadening mental horizons, mine were broadened far more by reading hard science fiction, for example (Greg Egan in particular), by learning programming languages, and by participating in online discussions (all in English because whether you like it or not, it is the universal language on the Internet) - than by learning French or Spanish. Also by living in a bunch of countries and being able to understand local realities far faster by talking to locals in English, than I would by having to first comprehend the language, then trying to understand the culture.