The "Hung Up" singer and her director husband Guy Ritchie have been taking lessons in Chichewa, which is spoken in the African country of Malawi where baby David Banda was born.
A source said: "Madonna and Guy use the few words they have learned - Mommy, Daddy, hello, my love and some others - every day."
"Madonna knows a Chichewa lullaby called 'Gona Mana' and has been working on a guitar piece to go along with it."