Speech therapy alone won't fix language delays. Kids need constant exposure at home because language learning happens through immersion, not isolated practice. Therapy sessions can't replace the thousands of hours of natural conversation a child needs to develop fluency and intonation.
Why? Just sending your child to speech therapy, occupational therapy, ABA therapy is not enough. And you need to teach at home. Number one is that language is actually something that you learn by exposure. It's all about exposure. It doesn't matter if you're learning a new foreign language or picking up your first ever language like your child is right now, There aren't people using it around you. You aren't going to pick it up that easily. Let's say that you're learning Japanese or Russian, and you're learning it through textbooks, apps, nowadays, websites, doing exercises yourself. Of course you're going to have some success. You're going to learn some stuff. But if no one around you speaks that language, the chances are you're not going to be very fluent in it. You're not going to learn the different intonations, the different words, the different sentence structures. Naturally.
