The English translation that Iverson mentions was in Harper's magazine. Iverson says it “was a report of an interview with Professor Weizenbaum,” so I’m not sure how complete it is.
In spite of having developed Harper’s first Android application, I no longer have a subscription to the back catalog, but perhaps I can put my library card to use!
Thanks for the link to the French article.
I am not sure where the English translation would be, but being Canadian it would not surprise me if Dr. Iverson was able to translate it himself.