According to me, the word OK is used by many people in the world. English speakers use it. Nowadays OK is spoken in other languages as well to express agreement. According to an article published in Smithsonian magazine, the word OK originated in the early 19th century. At that time, there was a trend of making English words fashionable. Because of this, there are many words that have been misspelled. The same happened with OK. Often, when we are talking to someone on the phone or face to face or through a message, we definitely use a word. That word is OK. We do this to agree on something.