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. There are also workbooks.
See Charles Duff who uses Basic English as the basis for other languages.
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.