My daughter is about the same age of yours. I think your girl will development naturally if you can always talk to her. My daughter can speak a lot of words, too. Last Saturday, we go to Sai Kung pier and I told her "grandpa is buying fish", she follow me and said "buy" "fish" & add "eat". Of course all in Cantonese. It is out of my surprise. She can link "fish" with "eat". So, I think if we can talk to babies often, they can absort knowledge naturally.