in which country do they speak English as mother tongue?

http://en.wikipedia.org/wiki/List_of_countries_whe...

There is a long list :)

Countries Where They Speak English

American Samoa

Anguilla (UK Territory)

Antigua and Barbuda

Australia

Bahamas

Barbados

Belize

Bermuda (UK Territory)

British Virgin Islands (UK Territory)

Canada (except Quebec, which is French)

Cayman Islands (UK Territory)

England (UK)

Fiji

Grenada (US Citizen)

Guyana

Ireland

Jamaica

Kenya

New Zealand

South Africa

St. Christopher-Nevis (St. Kitts-Nevis)

St. Lucia

St. Vincent & the Grenadines

Trinidad – Tobago

United Kingdom (includes Scotland & Wales)

These are the ones that list English as their native language. Others have English as a secondary language or paired with another language, but these are the ones where it is OFFICIALLY their native tongue.

English is a West Germanic language spoken originally in England, and is now the most widely used language in the world.[4] It is spoken as a first language by a majority of the inhabitants of several nations, including the United Kingdom, the United States, Canada, Australia, Ireland and New Zealand. It is the third most commonly spoken language in the world in terms of native speakers, after Mandarin Chinese and Spanish.[5] But it is more commonly used as a second language than any other, which is why its total number of speakers -- native plus non-native -- exceeds those of any other language. English is an official language of the European Union and many Commonwealth countries, as well as in many world organisations.

English arose in the Anglo-Saxon kingdoms of England and what is now south-east Scotland, but was then under the control of the kingdom of Northumbria. Following the extensive influence of Great Britain and the United Kingdom from the 18th century, via the British Empire, and of the United States since the mid-20th century,[6][7][8][9] it has been widely dispersed around the world, becoming the leading language of international discourse and the lingua franca in many regions.[10][11]

Countries where English is a major language

English is the primary language in Anguilla, Antigua and Barbuda, Australia, the Bahamas, Barbados, Belize, Bermuda, the British Indian Ocean Territory, the British Virgin Islands, Canada, the Cayman Islands, Dominica, the Falkland Islands, Gibraltar, Grenada, Guam, Guernsey, Guyana, Ireland, the Isle of Man, Jamaica, Jersey, Montserrat, Nauru, New Zealand, Pitcairn Islands, Saint Helena, Ascension and Tristan da Cunha, Saint Kitts and Nevis, Saint Vincent and the Grenadines, Singapore, South Georgia and the South Sandwich Islands, Trinidad and Tobago, the Turks and Caicos Islands, the United Kingdom and the United States.

In some countries where English is not the most spoken language, it is an official language; these countries include Botswana, Cameroon, the Federated States of Micronesia, Fiji, Gambia, Ghana, India, Kenya, Kiribati, Lesotho, Liberia, Madagascar, Malta, the Marshall Islands, Mauritius, Namibia, Nigeria, Pakistan, Palau, Papua New Guinea, the Philippines (Philippine English), Rwanda, Saint Lucia, Samoa, Seychelles, Sierra Leone, the Solomon Islands, Sri Lanka, Sudan, South Sudan, Swaziland, Tanzania, Uganda, Zambia, and Zimbabwe. Also there are countries where in a part of the territory English became a co-official language, e.g. Colombia's San Andrés y Providencia and Nicaragua's Mosquito Coast. This was a result of the influence of British colonisation in the area.

It is also one of the 11 official languages that are given equal status in South Africa (South African English). English is also the official language in current dependent territories of Australia (Norfolk Island, Christmas Island and Cocos Island) and of the United States (American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and the US Virgin Islands),[59] and the former British colony of Hong Kong. (See List of countries where English is an official language for more details.)

English is not an official language in the United States.[60] Although the United States federal government has no official languages, English has been given official status by 30 of the 50 state governments.[61] Although falling short of official status, English is also an important language in several former colonies and protectorates of the United Kingdom, such as Bahrain, Bangladesh, Brunei, Cyprus, Malaysia, and the United Arab Emirates.

http://upload.wikimedia.org/wikipedia/commons/thum...

Others are: Canada, Ethiopia, Ghana, Grenada, Guyana, Jamaica, Ireland, Netherlands, Liberia, Maltwa,etc.