software is a bad example since all the coding is done in english. the translation tools are inexpensive nowadays.
bilingual persons have lower rates of dementia so it's not even sure that standardising on one language would be a net benefit. also it's universally accepted that english is one of the more difficult languages to learn.
If there was a revival of the movement for a single language then english wouldn't be picked by non native english speakers.
How much easier is it to learn Esperanto than some broken form of simplified English that gets the message across and then also enables you to speak the native language of 26% of the world GDP?
I feel the perceived difficulty varies from person to person. Personally I found Mandarin much easier to pick up than German or Spanish, since you don't have to worry about conjugation.
