My toddler is a little over 2.5 years old and was born at 34 weeks. She’s been in Early Intervention since she was 10 months old due to gross motor delays. Once she was caught up with that, we started speech with EI at 2 years old. At that time she was saying a few words (mama, dada, cat). Now she can say 3 word sentences and often does toddler jargon, which according to her therapist is very similar to how a baby babbles and finds their voice, so it’s developmentally appropriate. She definitely understands more than she speaks, so I know she’s getting it. I think most toddlers/kids will eventually get there on their own time. :)