It takes at least six months practice at fifteen hours a week on a consistent basis to become proficient. In addition to the phonetic aspect, one needs a good understanding of metaphors and the levels of communication that the reversals reflect. The metaphorical aspect of reverse speech suggests that the mind is thinking in pictures, symbols and archetypes much like in dreams. In the deep unconscious there are prime metaphors. At the base of the structure of the psyche, all of human behavior, thought and emotion is instigated.
Metaphors have a life of their own.
They are living entities in and of themselves, like Jungian archetypes. The metaphors create behavior. The way they interact with each other depends on the behavior created. These are called structural or archetypal metaphors. Operational metaphors are how the archetype operates.