So at least they're aware of the problem, although that doesn't guarantee that they'll fare better in terms of attracting outside contributions.
Quite the opposite. Requiring most people in the world to learn a second and a third language to access science, technology and international job markets creates a higher barrier and increases inequality.
That's actually not true. More people speak Mandarin as a first language than English (which is third, behind Spanish as well). However, far more people speak English as a second (or third) language than do as a first language, so that English is actually the most widely spoken language.
English is popular as second language just because english is at the present moment the language with more access to documentation and resources, so more people needed to learn it to defeat language barriers. If in the future the language with more resources became Mandarin, more people will learn it as a second language.
2) Even if they were as equally distributed, you'd still be wrong about the number of speakers.
Amount is for uncountable nouns, like butter, sugar etc.