What does "English of the other sort" refer to in the following? is it used correctly?

The first of these is correctness and precision in the use of the mother tongue. The quite shocking slovenliness and vulgarity of much of the spoken English, as well as not a little of the written English, which one hears and sees, proves beyond peradventure that years of attendance upon schools and college that are thought to be respectable have produced no impression. When one hears English well spoken, with pure diction, correct pronunciation, and an almost unconscious choice of the right word, he recognizes it at once. How much easier he finds it to imitate English of the other sort!