An additional reason for studying English is for communication. You are much more accepted in the world if you portray yourself better. People will think of you in a better way and you will have a better chance of being accepted. You will most likely also have more opportunities in life.
In conclusion there are many reasons as to why studying English is important. One is being that you sound more educated and literate, two is to communicate properly with others, and three because it is important for career advancement and respect in the business world. Learning English never ends, there is the English dictionary that has so many words in it that most people have never even utilized or heard. Learning to properly use one new word each week is a great way to continually learn to utilize the English language