In my native language, we don't have too many rules for writing. Writing in my native language is not as strict in terms of punctuation rules and grammar. For example, in English we have to follow all the rules in our writing such as punctuation, period, etc., but in Farsi these rules are not so important. The main purpose of an article is to give the idea to the audience. In English academic writing, apart from giving the idea, the author has to follow all the rules, and that is the reason why English writing is difficult for any native.