Hinglish is the macaronic hybrid use of South Asian English and the Hindustani language. Its name is a portmanteau of the words Hindi and English. In the context of spoken language, it involves code-switching or translanguaging between these languages whereby they are freely interchanged within a sentence or between sentences.

Hindustani is an Indo-Aryan language spoken in Deccan, Northern India and Pakistan, and used as a lingua franca in both countries. Hindustani is a pluricentric language with two standard registers, known as Hindi and Urdu. Thus, it is also called Hindi–Urdu. Colloquial registers of the language fall on a spectrum between these standards. In modern times, a third variety of Hindustani with significant English influences has also appeared which is sometimes called Hinglish or Urdish.