It's completely normal for babies to not be able to speak at the age of 13 months, as there are individual differences in your baby's language development, some babies may have started to speak simple words at this stage, while others may not have started to speak yet. There are a number of ways that parents can help their babies develop their language skills positively.
Parents can actively expand the baby's vocabulary, when the baby says some words or sentences, help the baby to fill in the missing words in time, and help the baby deepen the impression through repetition and reinforcement, which will help the baby to learn vocabulary in the next stage.
For example, when a baby points to a cat and says "cat", parents can say, "Yes, it's a cat, the cat meows, and the cat has a tail and four legs." In this way, your baby can better understand and remember new vocabulary.
Parents can use simple words to strengthen their baby's language comprehension ability, communicate frequently with their baby, use simple and clear language to describe things and situations around them, and help their baby establish corresponding language concepts.
For example, when parents show their baby a book, they can describe the contents of the book in simple language, such as: "This is a book with puppies, kittens, and birds in the book." In this way, babies can gradually understand the connection between words and things.
At 13 months old, parents can tell their babies simple stories, slowly begin to understand the storyline, and can exercise the baby's memory and imagination by changing the details of the story.
For example, parents can tell their babies a story about small animals, and each time they tell the story, they can slightly change the plot or characters of the story, so that the baby can be more focused and engaged in the story, so as to improve the baby's language comprehension and memory.
In general, it is normal for a 13-month-old baby to not be able to speak, and parents can help the baby develop language skills by actively expanding the baby's vocabulary, strengthening language comprehension and storytelling, while giving the baby enough encouragement and support to let the baby grow and develop gradually in a pleasant atmosphere.