@ all
I have heard that even Punjabi speaking individuals face problem in writing Punjabi. Instead they prefer to go for Urdu as an optional.

I want to know that is there any script for the Punjabi language? & y do they feel difficulty in writing Punjabi? (I am sorry for my poor knowledge)

Although I can fluently speak Sindhi but can not write a single line of it correctly . Because there are a lot of letters (I guess 52 letters) in Sindhi. That is y I have always attempted my papers in Urdu in place of Sindhi.