D.W.
Let her drink milk it is good for her. The fat in milk is good for their brain development. my son did not say much when he was 18 months old but once he started going to the babysitter he started speaking much better. Now he speaks in full sentences. he is 2 years and seven months old. I think this is due to him being around other kids his age 3-5 days a week. Have her watch educational shows like super why,sesame street. Do flash cards with her with words on them and numbers. I would also recommend a computer for kids. One that goes over letters and numbers. My son can count well to twenty,knows the entire alphabet,and can associate letters with words like A is for apple. Sometimes they do through a phase of drinking milk or not drinking milk or eating only certain things. try different things and see what she likes. I know my son likes apples,bananas and grapes. He also likes carrotts,green beans,avacados,pasta.
work with her and have her around other kids her age. good luck