Watching your child's language develop is one of the most exciting parts of parenting a toddler. They'll learn new words daily, constantly surprising you with how observant a 2 year old child can be. Although there is a large range of "normal" when it comes to language development in kids, experts have developed a list of words your kid should be saying before 2 years, or at least by their second birthday, to act as a guide for parents to assess their child's vocabulary.
Although "no" and "mine" always seemed to be on the top of my toddlers' list of commonly used words, watching their language skills grow and develop is one of my favorite aspects of motherhood to this day. Even children whose language skills are slower to develop should still be using the words on this list of basic words. If you're worried that your kiddo isn't using as many as you'd hoped, scheduling an appointment with your pediatrician is a good starting place.
On the other hand, it's very possible that your child will say way more than 25 words by their second birthday — Parents noted that it's usually closer to 50 words. But this list can act as a guidepost of the bare minimum for your toddler's bourgeoning vocabulary.