Basic English was first made by an Englishman of great knowledge: Charles Kay Ogden.
When Ogden and his friend I. A. Richards were talking about senses of words, they got an idea that it was possible for them to give an account of the senses of any English word by using a limited number of words. Ogden kept on working for 10 years and came up with an English-based new international second language, in the 1930's. That is Basic English.