If your baby cannot speak at the age of two, consider the following reasons: autism: also known as autism in children, it is a pervasive developmental disorder that begins in infancy and early childhood and is characterized by varying degrees of speech and language impairment, interpersonal communication disorders, and narrow interests and stereotyped behavior. After the diagnosis is confirmed, appropriate rehabilitation and behavioral exercises can be given, and medication can be considered as an adjunctive treatment. The former is only due to language and logic disorder, but can understand instructions, and most children can express themselves normally afterwards. In the latter case, the child needs to have his or her language function measured and have some neurological examination done to determine if the neurological disorder is causing the child’s delayed language development, and give him or her the appropriate treatment according to the results. In addition to this, over-indulgence of family members, watching electronic products, lack of love and communication between parents are also reasons for the poor development of children’s language function, so parental companionship and communication is also essential.