We all live in one world, but we are talking
a very large number of languages, despite the difference of our
languages, children begin their words by saying "Mama"
as one of the first words whatever their language.
According to the Russian linguist Roman Jacobson, the easiest
words for humans are the open vowels so the child vocalize sounds like Ah, when
he grows up a little bit starts to practice pronunciation correct, but the rest
of the characters start with characters requiring to close the mouth and lips
such as “Mm” and “Bb” so that's why the child make the sound "Mmm"
before opens his mouth to hear the magic word "Mama" or "Papa".
Besides research tells us that children are not intended to refer
to his mother and father when he says “Mama" and "Papa", but
refers to the food.