A.     Ogden's ideas for a less complex language were only developed in English which was his decision for an international helping language.
    However, a person he worked with, I.A. Richards, with Christine Gibson, after making "English Through Pictures", which uses only Basic English words, went on to develop the same thing in other languages, covering French, Spanish, Italian, German, Russian, Hebrew. These books are pocket-sized paperbacks of the 1950s and 60s and are frequently discovered through the online, out-of-print book stores. Suggestion : First give a look to Advanced Book Exchange, www.abebook.com, and search for author name : Christine Gibson. (Richards wrote too much.) There are also workbooks.

A.     Ogden's Basic English is a language that is condenses standard English into 850 words. The language is good English, though without literary pretence, and requires no unlearning to progress to full English.
    This is not an introductory grammar site.
In Basic :
    Ogden's Basic English is a language that does everything of full English in only 850 words. The language is good English, though not able to do delicate writing of a great language. A person does not need any unlearning to move on to full English.
    This is not a website for beginning with the rules of English.

A.     Of course, but then you then no longer have Basic English and cannot make claim to be Basic English. Ogden considered that writings for the public that are 80% Basic are clear enough to be understood. As a starter language, Ogden provided a path to a fuller English based on the same principles that were used to establish the basic Basic English. This no longer Basic English, but an expanded Basic English, from 850 words to about 2,000, because a learner of Basic English would not be able to understand.
    Several organizations have adapted Basic to their uses and given it a new name. The foundation work by C.K. Ogden for Basic English should be acknowledged. Some of these organizations fail to do this and is in extremely poor taste..

A.     Because everybody wants to "improve" Ogden's Basic English to meet their own ideas of what either an International Second Language or a starter English language should include. Everyone as favorite words they cannot live without or want to make Basic more complete. Ogden developed Basic to be easy to learn and expansion defeats that. His concept of no verbs (rather, combinations of only13 operators plus 20 directions {prepositions}) is an example. Some of the Basic vocabulary is characteristically Commonwealth and somewhat dated, but there is a wealth of publications in Basic that would become obsolete if the vocabulary were changed. Many want to structure the language to there own part of the world, which would defeat the commonality of an international world language.
    As a starter language, Ogden provided a path to a fuller English based on the same principles that were used to establish the basic Basic English.

A.     Simple English is Basic English with the addition of most common other English words and sometimes another subset such as V O A Special English or local language English words. The idea is that Basic English assures that anything can be expressed, and the common words - mostly redundant filler words - make the language flow more smoothly. These common words can be learned from context.
   Simple English also is used for the idea to communicate in uncomplicated ways -- use short sentences, one idea per sentence, avoid college level words or jargon; use simple grammar, and so forth..