Your map is only a political map of new province SOUTH PUNJAB including 2 districts of Kyber Pakhtunkhah on administrative basis not on language basis which includes 11 Saraiki districts ( DI Khan, Tank, Bhakker, Layyah, DG khan, Rajanpur, MuzzafarGarh, Multan, Lodhraan, Bahalwalpur and Rahimyar khan) and 12 Punjabi majority districts (Toba tek singh, Chaniot, Jhang,Khanewal,Vehari, Bahawalnagar,Khaushab, Sargodha, Mianwali, Sahiwal, Pakpattan, Okara) as per Census of Pakistan 1998. u can check them in district profile books percentages of languages as choosen by the people of those district as their mother tongue. Thanks.