You should identify your audience to decide what language is appropriate. You should choose your chose of word wisely, as if you chose language that isn’t appropriate the reader may be unfamiliar with some word and become confused and not continue to read the document. If the reader is someone higher in the profession you will use word that maintain the readers interest as they may have a lot or documents to go through so you should have high grammar and spelling to insure you keep up to their standards. Whereas, if your reader is someone younger or with less education it would not be a good idea to use hard vocabulary as the reader could become frustrated and not understand the context of the document. The document might have high standard language and grammar as it could affect the company’s image.