Question on Parenting

Often I see new parents asking questions such as "When to wean baby off pacifier?" or "When to toilet-train children?" but I've yet to come across one that's been bugging me - When do we stop talking to our kids in third person? We've been talking in third person with Munchkin so much that sometimes, she still hasn't used 'you' and 'me' correctly. Come to think of it, up till now, I still speak this way with Matriarch but then it sounds pretty normal in Malay.