Pakistan is the North part of Northern India. West of the Indus and North of the Jehlum is not even S Asia. North South divide is thus inapplicable here in that sence. The North- South divide in pakistan refers to the two main population centers, the Northern Arc which comprise the cities of, Peshawar, Mardan, Islamabad, Sialkot, Gujarawala, Sargoda, Lahore and Faisalabad. This area is industrialized, and developed, and mostly, Punjabi-pakhtun. As opposed to this the southern population centers, of DG Khan, Layai, Hyderabad, Sukkhur etc are all on ths Indus, and mostly poor, and Siaraki, Balochi, Sindhi. This is not a racial or linguistic divide, they are all caucasoids and speaking Indo-European Languages. As for
As for the languages, the only Dravidian type language spoken in Pakistan is Brahui. However the people are not Australoid.