Urdu
Most people in Pakistan speak it as a 'lingua franca'. There are parts of India that speak it, such as Delhi, Bihar, and Uttar Pradesh, for example. Despite a few differences, the words in Hindi are very similar to Urdu. The way it is written, is different from how Hindi is written. People who speak Hindi and Urdu may be able to talk, but they may not be able to understand or express the meaning of one of these two scripts.