All kids learn to talk in the same order. First they use individual words, then they use word combinations, and finally: full sentences. How and when your child learns and masters spoken language is highly individual. They all have their own personal timeline. It could be fast, or it could be slow. Sometimes, it feels like nothing is happening and then suddenly, they’ll make massive progress. So avoid drawing comparisons. In fact, that’s a good rule of thumb in a lot of situations.
All children are different and develop at different paces. This applies to speaking, too. Your child might not use very many words, or they might use lots of words, but no sentences. If they understand your questions, can follow very simple instructions and clearly understand what you’re saying, you can rest assured. They’ll start talking; just give it time. If you have any questions or concerns, you can talk to your doctor.