We had concerns for our daughter's language development. As a baby she'd had tons of ear infections, following by having tubes in her ears at six months. In Connecticut they have a Birth to Three program where therapists come out and evaluate your child. Before kids are three, what is the norm covers a broad swath.
Listen to the daycare... talk to your pediatrician, call in professionals as needed.
When my daughter was old enough to take a quantitative hearing test (around age 6) we discovered she'd been more or less deaf for the first year and a half of her life from the ear infections. Her dream is to be a Broadway actress, her speech is articulate as is her singing.