Yes, I remember encountering Esperanto many, many years ago. I do not know how much it has spread or at what rate, although your comment seems to indicate that there has been at least some progress. (Hope I didn't misunderstand you.)
English does serve well as a lingua franca. It has also become a pluri-centric language. Who knows, in the future its development may mimic that of Latin, which eventually spawned a number of related but distinct languages. Right now, it's the best we've got. Two huge English-speaking empires have given it a vast distribution.
And with regard to native speakers: sure, there can be no doubt that they have an advantage--which may be a greater consideration, say, when producing a novel than when reading one. But your point still stands.
English does serve well as a lingua franca- yes, however Esperanto would serve much better. Ask Chinise people what they think about English, or better ask English teacher teaching English over there... or non English academics who have to write their thesis in a foreign language.
Esperanto is now a real natural language (a bit like a global minority language), spoken around the globe, with some tousands of native speakers .... on Duolingo alone more than 600 000 English speaker learning it. Google a bit or if you like read my article here on Steemit:
https://steemit.com/esparanto/@johano/steem-engine-for-a-global-language
By the way I am a great fan of diversity too.
You’ve posted very interesting thoughts. I have translating experience and am keenly aware of communication difficulties. Also—since you mentioned China—I have a number of Chinese friends and often see how difficult English can be for them . . . and for Russian speakers, too . . . and German speakers . . . and . . . (big smile). So I am receptive to the idea of an international language.
I enjoyed reading your article! Thanks so much. I’ll be posting quotes (which are another kind of international connector) about once a week. If you have a minute, please drop by.
Thanks and followed.