The InnerTalk language learning programs combine Eldon Taylor's patented and proven Whole Brain InnerTalk technology with the learning materials from a well known publisher of language learning courses. The original, fully audible language course was designed so that you could learn a new language without using a textbook. The two InnerTalk CDs were then specially mastered with a subliminal version of the vocabulary portion of the language course. The vocabulary is recorded in forward and reverse on the Whole Brain InnerTalk CDs. The forward and reverse recordings have been shown to be a natural aspect of language learning and development in children.