Hi now they will use lot of words like mumma ,dadda, daadi,didi,bhai, aunty,clap, come,no, yes,sit ,water etc in whatever language we teech them. Slowly you can teach sentence " come here" " i want water" etc. The more you speak the more they will learn.

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Depends upon kid to kid..some around one year or so others a little later...just like other milestones it varries from baby to baby ..