My source says that the inflated numbers are from "learners". Now this could mean that they are advanced students, but for the purposes of this quiz I am going to assume that they are mostly low level learners.
You don't really need A.D or 1/18, you can just say 'As of 2021'. And try to simplify your caveats. You could also simplify the title by saying 'Asian countries with the most English speakers' but that's just my opinion :P Otherwise, good quiz!