Karachi is the capital city of the Pakistani province of Sindh. It is the largest city in Pakistan and the 12th largest in the world, with a population of over 20 million. It is situated at the southern tip of the country along the Arabian Sea coast and formerly served as the capital of Pakistan. Ranked as a beta-global city, it is Pakistan's premier industrial and financial centre, with an estimated GDP of over $200 billion (PPP) as of 2021. Karachi is a metropolitan city and is considered Pakistan's most cosmopolitan city, and among the country's most linguistically, ethnically-, and religiously-diverse regions, as well as one of the country's most progressive and socially liberal cities.

Urdu is an Indo-Aryan language spoken chiefly in South Asia. It is the national language and lingua franca of Pakistan, where it is also an official language alongside English. In India, Urdu is an Eighth Schedule language, the status and cultural heritage of which are recognised by the Constitution of India; and it also has an official status in several Indian states. In Nepal, Urdu is a registered regional dialect and in South Africa it is a protected language in the constitution. It is also spoken as a minority language in Afghanistan and Bangladesh, with no official status.