Through ordinary communication, you will be able to interpret misunderstandings for your child. It will not always be easy to tell when your child is confused, and he will be unlikely to openly declare his need for help. You can interpret words, phrases, metaphors, and figures of speech for him.
To help with figures of speech, your child will probably enjoy making a book with drawings or magazine pictures, one picture to illustrate the literal meaning and one for the real meaning. Your child is sure to have fun making silly pictures of “cat got your tongue?” or “the early bird gets the worm” and then finding pictures that show the correct meaning. Children’s joke books and comedies can increase understanding of humor.
The most difficult challenge will be in helping your child understand teasing and sarcasm, as he will interpret these literally and miss the emotional tone and intention. You can help him by prompting him to think about who is teasing, is the tone of their voice friendly, are they smiling, and what happened just before the teasing or sarcasm. In this way he can come to interpret the intent of the words, instead of only their exact definition.