ENGLISH is the most global language of all; it is used not only by the people of the former British Empire, but also by international organisations.
It is not the easiest language to master. Its spelling system is sometimes idiotic and its pronunciation, illogical. But, admittedly, it is one of the most well-developed languages in the world. Because it is so widespread, the language tends to take on a life of its own, with peculiar variations, once it has taken root in a particular nation or region that is not its country of origin.