Hello,

> 1-What is origin of Pli language
> 2-Which is its birth place .
> 3-What was the mother tongue of Bhudda
> 4- What are the reasons of death of Pali
> 5-What is its position in this age

May I recommend you the articles:

http://www.zencomp.com/greatwisdom/ebud/ebsut059.htm
http://www.lioncity.net/buddhism/index.php?showtopic=21924

Regards, Dmytro