I think you have to understand that "international English" is not the same as English. We have the same thing in France where lots of people come to study from other countries where they speak French, and their French is a little different. I'm not going to waste anyone's time on correcting someone because they said "le table" and not "la table". Same thing with the pronunciation. I can understand them, they can understand me, and that's what matters. That's the "price" of having a huge influence in the world.