I'm double posting sorryyyy!
I understand Rosie is behind on her speech and baby talk can help with speech progression, but if you look at her Brinley highlight on Instagram, Brinley is around the same age Rosie is right now in the beginning of those highlights and Acacia's baby voice isn't nearly as ridiculous when talking to her as it is when she currently talks to Rosie. The high pitched cutesy voice is fine, but the word mispronunciation and replacing R's with w's isn't helpful at all.