He invented and proselytized Basic English. Orwell's Newspeak was probably modeled on it.

(1889 – 1957) Charles Kay Ogden was an incredibly productive and versatile British scholar, linguist, philosopher, and writer. He, along with I. A. Richards, invented an 850-word version of English called Basic English. The 850 words were deemed the minimum number of words necessary to say anything you want to say English.
Note: George Orwell's Newspeak, the similarly stripped-down version of English described in his novel 1984, was probably inspired by the Basic English's example.