There are individual differences in the age at which infants speak and no generalizations can be made. In general, they begin to murmur word syllables at about five months. At seven months, they begin to pronounce words unconsciously, such as daddy and mommy. Simple syllables from adults can be repeated at eight months. Ten to eleven months begin to use words, using one word for multiple meanings. Infants’ language ability grows gradually. If they are still unable to speak at the age of two years or above, it is necessary to consider whether there is a backwardness in language development. Parents are advised to pay more attention to the infant’s speech, and should pay attention to giving the infant more sound stimulation and creating more opportunities for speech. If the infant is unable to speak, it is recommended to go to the hospital in time for regular treatment.