It’s important to note that the number of words a 15-month-old can say varies greatly from child to child and depends on various factors such as the child’s language exposure, development, and individual differences.
On average, a 15-month-old may have a vocabulary of around 10-20 words. However, it’s unlikely that a 15-month-old could say 800 different words, as that is a very large number of words even for adults.
So, it’s not possible to determine how many words a 15-month-old can say
How many words can a 15 month old say ?