I know that my plainness of speech makes them hate me, and what is their hatred but a proof that I am speaking the truth? (Socrates, ancient Greek philosopher)
In a highly political time (like ours), plain speech is rare. Sometimes very fancy speech hides deeper meanings to words that are confusing. Other common words may be used, but they often have hidden meanings that are easily (perhaps intentionally?) misunderstood. As with Socrates, some honest speakers will be opposed because their simple speech is accurate and convicting.
Avoid all perverse talk; stay away from corrupt speech. . . . From a wise mind comes wise speech; the words of the wise are persuasive. (Proverbs 4:24; 16:23)