You raise a great point here. At what point will a non-English speaking country become the nation with the most English speakers? In my mind, surely that is Indian by 2050. If they can become upper middle income by that time (I am sure of it), then I guess more that half of adults will speak English at least at elementary to middle school level. (Dear reader: Please don't read that as a slight against the English language skills of Indians. I know from personal experience: With five grade level language skills, you can get a lot done!) They would way out number the number of English speaking Americans.