Hindustani

Primary language family: Indo-European

Subfamily: Indo-Aryan

Endonymic glossonym: हिन्दी-उर्दू ہندی-اردو (Hindōstānī)
Exonymic glossonyms: Hindi-Urdu

Approximate total number of speakers = 785,000,000 (10% of Earth's population)

The modern flag of India

The modern flag of Bangladesh

The modern flag of Pakistan