mum or mummy, usual in the UK, Australia, and parts of Canada;
mom or mommy, in North America (especially the U.S.), and in the Midland areas of England.
mam or mammy, North Wales, the South Wales valleys , Ireland, Northern England and The Netherlands;
mama and ma, in parts of the middle east, Latin America and other Spanish-speaking cultures
In many other languages, similar pronunciations apply; maman in German, mamma in Italian, or mama in European. In many south Asian cultures, the mother is known as amma or oma or ammi, or variations thereof. The "M" sound seems to be near universal to the word mother in many different languages; this is thought to be related to one of the first sounds an infant learns to control, the smacking of its lips together as it comes off the breast Many times these terms denote affection or a maternal role in a child's life.