The word for “moth­er” seems often either to be mama or have a nasal sound sim­i­lar to m, like nana. The word for “father” seems often either to be papa or have a sound sim­i­lar to p, like b, in it—such that you get some­thing like baba. The word for “dad” may also have either d or t, which is a vari­a­tion on say­ing d, just as p is on b. Peo­ple say mama or nana, and then papa, baba, dada, or tata, world­wide.