Writing tip number five is similar to writing tip number four: Know Your Audience. When addressing a general audience, refrain as far as possible from using foreign words or phrases. (Some writers go so far as to use foreign sentences and paragraphs, leaving many of their readers completely baffled.)
It is also a good idea to not use English words that are too rare, big or difficult to pronounce. A friend of mine used to say, "If you have an advanced vocabulary, you might as well use it." However, how would it benefit the communicator if the audience with whom she is trying to communicate cannot understand her?
Do not try to appear intellectually deep by using obscure words or incomprehensible jargon. This is not necessary. On the contrary, a wise man once said, "It is better to be profound in clear terms than in obscure terms." Indeed, by trying to appear especially deep, the writer might merely come off as arrogant, pretentious, and pedantic.