Here’s a nice video summarizing the history of the English language. This starts from the beginning, and explores how folks from outside England, like the Anglo-Saxons, the Latin-speaking Christians, the Vikings, and the Normans brought a plethora of words which make up the English language today. It also explores the impact Shakespeare had on the language, with the plethora of words and phrases he invented, and how the Empire took the language and made it global, while at the same time absorbing influences from a host of languages. It goes on to also tell us about the impact of technology on the language.
And it also tells us how the proponents of the fine art of speaking Hinglish, Chinglish, or Singlish, who practise this art form every day are furthering a language very uniquely their own.