The main difference between Hindi and Urdu is that the Hindi is a language in India and Urdu is a language in Pakistan.
Hindi (Devanagari: हिन्दी, IAST: Hindī), or Modern Standard Hindi (Devanagari: मानक हिन्दी, IAST: Mānak Hindī) is a standardised and Sanskritised register of the Hindustani language. Hindi, written in the Devanagari script, is one of the official languages of India, along with the English language. It is one of the 22 scheduled languages of the Republic of India. However, it is not the national language of India because no language was given such a status in the Indian constitution.Hindi is the lingua franca of the Hindi belt, and to a lesser extent other parts of India (usually in a simplified or pidginized variety such as Bazaar Hindustani or Haflong Hindi). Outside India, several other languages are recognized officially as “Hindi” but do not refer to the Standard Hindi language described here and instead descend from other dialects of Hindustani, such as Awadhi and Bhojpuri. Such languages include Fiji Hindi, which is official in Fiji, and Caribbean Hindustani, which is a recognized language in Trinidad and Tobago, Guyana, and Suriname. Apart from specialized vocabulary, spoken Hindi is mutually intelligible with standard Urdu, another recognized register of Hindustani.
As a linguistic variety, Hindi is the fourth most-spoken first language in the world, after Mandarin, Spanish and English. Alongside Urdu as Hindustani, it is the third most-spoken language in the world, after Mandarin and English.
Urdu (; Urdu: اُردُو ALA-LC: Urdū [ˈʊrduː] (listen)) (also known as Lashkari, locally written لشکری [lʌʃkɜ:i:])—or, more precisely, Modern Standard Urdu—is a Persianised standard register of the Hindustani language. It is the official national language and lingua franca of Pakistan. In India, it is one of the 22 official languages recognized in the Constitution of India, having official status in the six states of Jammu and Kashmir, Telangana, Uttar Pradesh, Bihar, Jharkhand and West Bengal, as well as the national capital territory of Delhi.
Apart from specialized vocabulary, spoken Urdu is mutually intelligible with standard Hindi, another recognized register of Hindustani. The Urdu variant of Hindustani received recognition and patronage under British rule when the British replaced the local official languages with English and Hindustani written in Nastaʿlīq script, as the official language in North and Northwestern India. Religious, social, and political factors pushed for a distinction between Urdu and Hindi in India, leading to the Hindi–Urdu controversy.According to Nationalencyklopedin’s 2010 estimates, Urdu is the 21st most spoken first language in the world, with approximately 66 million speakers. According to Ethnologue’s 2017 estimates, Urdu, along with standard Hindi and the languages of the Hindi belt (as Hindustani), is the 3rd most spoken language in the world, with approximately 329.1 million native speakers, and 697.4 million total speakers.
an Indic language of northern India, derived from Sanskrit and written in the Devanagari script. It is the fourth most widely spoken language in the world, with more than 250 million people speaking it as their first language.
relating to Hindi.