Its very variety, subtlety, and utterly irrational, idiomatic complexity makes it possible to say things in English which simply cannot be said in any other language.
You think about every piece of idiomatic speech adopted by white men over the past ten or twenty years; virtually all of it comes from hip-hop.
When you doubt between words, use the plainest, the commonest, the most idiomatic. Eschew fine words as you would rouge; love simple ones as you would the native roses on your cheek.
The true speech of man is idiomatic, if not of the earth and sky, then at least of the saloon and the bleachers.