Expressive Language is how your child expresses his or her wants and needs.  Children with an expressive language delay have difficulty communicating with words and sentences in conversation, using appropriate vocabulary, grammar, and sentence structure. Your child may have an expressive language disorder or delay if he uses fewer words than his or her peers, substitutes the wrong word, has trouble finding the right word, difficulty conveying information, difficulty formulating questions, and problems with both oral and written expression. Expressive language problems can have an impact on academic and social success.