A little correction should be done about the numbers of french-speaking people : 67.8M is more or less the French population but french-speaking people are way more than just the French, it's also Belgium and all of the countries from the ex-colonial empire. The Francophonie (french-speaking population) is more like 200M+ people.
In addition, 30% of the people in China don't speak Mandarin. Many of the 70% of Chinese who do speak Mandarin, don't speak it well. Modern Standard Arabic is a literary language used in professional settings. Everyday conversation is in a local Arabic dialect. Perhaps only half of "Arabic" speakers can speak MSA.