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English serves as the lingua franca in many international business settings.
The lingua franca of India and Pakistan is Urdu/Hindi.
A lingua franca is a common language that is used for communication between people of different languages and cultures.
Lingua Franca is not a country, nor it is it located in any specific countries.
The lingua franca for India and Pakistan is Hindi/Urdu--which are functionally the same language.
The current lingua franca is English, but that may be set to change in the next few years.