"Your manuscript is both good and original, but the part that is good is not original, and the part that is original is not good"
Before you write and essay or submit work as part of admission to a course or a college then think about how you will write it. One of the problems that is often seen is that of writing too ornately that the candidate can appear pompous or condescending to the admission panel. It shows in your writing so keep things straightforward and simple.
In some languages, as in English and French, the modern freezing of spelling has removed the writing more and more from pronunciation and has resulted in the need to teach spelling and the growth of fallacies like the "silent" letter (a letter is really either the symbol of a sound or it is unnecessary).