Children who cannot speak at the age of two may be physiologically late in their own development, which is normal at this time. There may also be abnormalities caused by pathologic factors, such as hearing impairment, structural disorders, neurological problems and so on. 1. Physiological factors: two-year-old children if the articulation organs, ears, brain and other systems are normal, it may be slower physical development or genetic factors related to this is a normal phenomenon, parents can guide the child in daily life more vocal. 2. Pathological factors: (1) Hearing impairment: children with hearing impairment have limited ability to listen to other people’s language, which may lead to deficiencies in receptive language and language expression skills. (2) Structural disorders: If a child has structural disorders such as cleft lip and palate, partially truncated tongue, or short tongue tie, this can also affect articulation, resulting in a failure to speak. (3) Neurological problems: If a child has a brain tumor or a neurological disorder such as cerebral palsy, it can lead to neuromuscular impairment, which can cause speech problems. When a child is still unable to speak at the age of two, parents are advised to take the child to a pediatric specialist clinic to clarify the cause of the problem and then proceed with targeted treatment.