I don't speak to my daughter like a baby. I don't say goo goo gaga, or whatever baby talk it is you want to do. That doesn't mean I don't do child-directed speech. I slow down my speech and highlight things. I point to objects, but I absolutely don't repeat the errors that she makes. If she calls something "bot bot," like a bottle, I don't say "bot bot" back. I repeat the correct word. I literally just say bottle in response to her after she says bot bot. Because she's attempting to say the word I'm saying, but if I say the wrong word back to her, the one that she was attempting to say, she's going to be reaffirmed and think that's the right word, whereas if I say bottle back to her, she gets another chance to hear how that sounds and potentially try it out as a word in her mouth.