Yeah, the RIGHT to speak/use their own language. West Pakistan killed the first East Pakistanis in the 50s, and it was when the East Pakistanis demanded their own language be given official status (them asking for their right).
We have to see a thing from all corners. The Bigger picture.
If a Punjabi Engineer is working with a Sindhi Engineer. The Punjabi Engineer wants to discuss about the construction of a building. He has studied in Punjabi Language while the Sindhi has studied in Sindhi. Tell me one thing. Both of the Engineers will have separate vocabularies for the tools they will have to use to construct that building. How will they converse with each other. Will it not be difficult for them to work with each other. Will they have to bring a translator with them. So we have to see all the corners of a thing. Please give the solution of the problems I raised if you want Provincial languages to flourish. We have to have some common platform. If education will be given in regional languages then what will be the medium of cross communication and cross co-operation. Secondly can you give me one nice example. If you give the example of India, their education is mostly in English. So even they had to have some common language in order to solve this cross platform problem. What solution you can give.