Bengali is the language spoken in Bangladesh. Thanks for asking AnswerParty.
Languages of Asia
There is a wide variety of languages spoken throughout Asia, comprising a number of families and some unrelated isolates. Many languages have a long tradition of writing.
The major families in terms of numbers are Indo-European in South Asia and Sino-Tibetan in East Asia. Several other families are regionally dominant.
Bengali literature (Bengali: বাংলা সাহিত্য, Bangla Sahityô) denotes the body of writings in the Bengali language in South Asia. The earliest extant work in Bengali literature is the Charyapada, a collection of Buddhist mystic songs dating back to the 10th and 11th centuries. Thereafter, the timeline of Bengali literature is divided into two periods − medieval (1360-1800) and modern (after 1800).
Medieval Bengali literature consists of various poetic genres, including Hindu religious scriptures (e.g. Mangalkavya), Islamic epics (e.g. works of Syed Sultan and Abdul Hakim), translations of Sanskrit, Arabic and Persian texts, Vaishnava texts (e.g. biographies of Chaitanya Mahaprabhu), and secular texts by Muslim poets (e.g. works of Alaol).
India; in following States and Union territory:
Bengali // or Bangla // (বাংলা Bangla [ˈbaŋla] ( listen)) is an eastern Indo-Aryan language. It is native to the region of eastern South Asia known as Bengal, which comprises present-day Bangladesh, the Indian state of West Bengal, and parts of the Indian states of Tripura and Assam. It is written using the Bengali script. With about 220 million native and about 250 million total speakers, Bengali is one of the most spoken languages, ranked seventh in the world. The national song of India, national anthem of India, and the national anthem of Bangladesh were composed in the Bengali language.
Comillar Kagoj is a major daily newspaper in Bangladesh, published from Comilla in the Bengali language.
Languages of India
The Indo-Aryan or Indic languages are the dominant language family of the Indian subcontinent, spoken largely by Indo-Aryan people. They constitute a branch of the Indo-Iranian languages, itself a branch of the Indo-European language family. Indo-Aryan speakers form about one half of all Indo-European speakers (approx 1.5 of 3 billion) and more than half of Indo-European languages recognized by Ethnologue.
The largest in terms of native speakers are Hindustani (Hindi-Urdu, about 240 million), Bengali (about 230 million), Punjabi (about 110 million), Marathi (about 70 million), Gujarati (about 45 million), Bhojpuri (about 40 million), Oriya (about 30 million), Sindhi (about 20 million), Nepali (about 14 million), Chittagonian (about 14 million), Sinhala (about 16 million), and Assamese (about 13 million) with a total number of native speakers of more than 900 million.
Languages of Bangladesh
The Languages of India belong to several language families, the major ones being the Indo-Aryan languages spoken by 73% of Indians and the Dravidian languages spoken by 24% of Indians. Other languages spoken in India belong to the Austroasiatic, Tibeto-Burman, and a few minor language families and isolates.
The official language of the Union Government of Republic of India is Standard Hindi, while English is the secondary official language. The constitution of India states that "The official language of the Union shall be Hindi in Devanagari script." a position supported by a High Court ruling. However, languages listed in the Eighth Schedule of the Indian constitution are sometimes referred to, without legal standing, as the national languages of India.
The official language of Bangladesh is Modern Standard Bengali (Literary Bengali). Although the country is home to 38 different languages, Bengali is spoken by the vast majority of the population, with 98% of Bangladeshis fluent in Standard Bengali or Bengali dialects as their first language. The indigenous peoples of the Chittagong Hill Tracts and tribal communities in northern Bangladesh, however, speak their own indigenous languages. Bangladesh is also home to Hindustani-speaking migrants from India and Pakistan, as well as Burmese and Arakanese-speaking migrants from Myanmar.
English, though not having official status, is widely prevalent across government, law, business, media (newspapers), culture and education, and can be regarded as the de-facto co-official language of Bangladesh.