English people ruled the world and their language was familiar to everyone. Rather than to learn each country’s language separately, it was easy to decide one common language to communicate with every country.
So such an important language needs to be learnt correctly. Especially, English language has many tricky rules that many of us don’t know or we just ignore it. I won’t say none of you know these rules, but I found some rules after so many years that I feel I need to spread these rules as much as possible.