English had barely established itself as a language in England when it began moving to other countries to be used there as welt. First it headed north to Scotland and then west to Wales. It then made its way across the sea to Ireland. That was in the Middle Ages. Over the course of the following centuries it has put down roots all over the world, from the USA to South Africa, from India to New Zealand. Of course, in all these countries it has developed in special ways to suit the new contexts in which it found itself.