A dialect is a form of a language spoken by a group of people. Sometimes people who live in the same place share a dialect. Sometimes people who are similar in some other way, such as social class, share a dialect.
There is no absolute difference between a dialect and a language. British English and American English are different standard dialects of English. They differ slightly in spelling, in pronunciation, and in vocabulary. However, they are "mutually intelligible", which means people who speak either variety can understand the other.
Deciding if something is a language or a dialect is sometimes a political decision as a way to make minority groups assimilate or become part of a nation's larger culture. Linguist Max Weinreich once joked, "a language is a dialect with an army and a navy."
Japanese and the Okinawan language are related, as they are Japonic languages, but they are not mutually intelligible. When Japan took over Okinawa during the Meiji Era, the Japanese government called the Okinawan language a dialect of Japanese. This was used to forbid Okinawans from speaking Okinawan and to force them to Japanese.
Hindi and Urdu are called different languages today, but they used to be the same language, Hindustani. After Pakistan became separate from India, Hindustani became called Urdu in Pakistan and Hindi in India. However, speakers of both can understand each other if they are using everyday speech. The two languages use different writing systems, but writing systems are not an accurate way to decide if languages are related.
In past times, travel was difficult and so dialects developed in quite small regions. In Britain, there were dialects in the different parts of the country, and traces can stiill be heard today. The Romance languages were dialects of Latin that separated in that way.
Differences in dialects can be:
- words: people in England to church, but in Scotland, people go to kirk.
- Pronunciation: the r of creatures is silent in most of England but is pronounced by most of the United States.
- grammar: instead of I dived, a few people say I dove.
In India, there are scores of dialects of Hindi language like Rajasthani, Bhojpuri, Chhattisgarhi, Magadhi, Haryanvi and others. Moreover,people whose native language is Hindi, may or maynot treat it as their mother tongue.