"The critical period for language development begins at birth."
ChildUp Early Learning Key #1: Newborns are ready to excel at anything
Any human newborn in good health is ready to learn any skill and excel at anything. In fact, the thousands of genes determining a baby’s brain are like switches just waiting to be turned on (or not!) by experience and the environment. The first years are the most crucial ones for building the brain, which - with around 86 billion neurons eager to connect - will never be so agile and flexible later in life.