Do you remember the lullaby that your Grandma sang to you while you were 6 months old? No? This study shows that if Grandma sang the song to you again, chances are it would sound familiar to you, even if you haven’t heard it since you were 6 months old. Language and it’s vocal patterns can also be identified by infants as young as 3 months.
https://www.livescience.com/59614-babies-retain-early-exposure-to-languages.html
German School Phoenix 