It's true they get to hear you speak and interact with others which helps develop their language skills and they feel all of your movement which they find stimulating too! (rookiemoms.com)
What kind of talking to expect from your 2 - year - old and how you can help children develop their language skills at this age. (babycenter.com)
Kids could also develop their language skills by practicing different styles of speech with different parents. (sciencenews.org)