The statement that children who speak later are smarter is not scientifically valid and is not true.
Normal babies start teething from about 1 year old and can say a few simple words. If a baby can’t speak at the age of 3, it can be called a delayed language development. There are many factors that cause delayed speech development, so you need to find the cause of the delay and carry out rehabilitation exercises in a timely manner, so as not to affect the baby’s speech in the future.
The growth process of the child has a certain law, do not have to compare, as long as the child in the normal growth space to learn to walk and talk can be. Do not use multiple languages or dialects at home at the same time, parents pay attention to chat with the child more, to guide rather than force the child to learn to speak.