English is the most widely used language in business in SAARC countries due to its historical legacy as the official language of many of these countries during British colonial rule. It is also the language of international business and diplomacy, making it a convenient choice for communication between businesses in different SAARC countries.

Hindi is the official language of India, as specified in the Indian constitution. It is also one of the most widely spoken languages in the world, with over 500 million native speakers.

Urdu is the official language of Pakistan, as specified in the Pakistani constitution. It is also the national language of Pakistan and is widely spoken throughout the country.

Bengali is the official language of Bangladesh, as specified in the Bangladeshi constitution. It is also the national language of Bangladesh and is widely spoken throughout the country.

Sinhala is the official language of Sri Lanka, as specified in the Sri Lankan constitution. It is also the national language of Sri Lanka and is widely spoken throughout the country.

Nepali is the official language of Nepal, as specified in the Nepalese constitution. It is also the national language of Nepal and is widely spoken throughout the country.

Dzongkha is the official language of Bhutan, as specified in the Bhutanese constitution. It is also the national language of Bhutan and is widely spoken throughout the country.

Dhivehi is the official language of the Maldives, as specified in the Maldivian constitution. It is also the national language of the Maldives and is widely spoken throughout the country.

Dari is the official language of Afghanistan, as specified in the Afghan constitution. It is also the national language of Afghanistan and is widely spoken throughout the country.

English is the official language of the SAARC Secretariat, as specified in the SAARC Charter. This is due to the fact that English is the most widely used language in business and diplomacy in the SAARC region.

English is the most widely used language in business in India, due to its historical legacy as the official language of India during British colonial rule. It is also the language of international business and diplomacy, making it a convenient choice for communication between businesses in different parts of India.

Urdu is the most widely used language in business in Pakistan, as it is the official language of the country. It is also the national language of Pakistan and is widely spoken throughout the country.

Bengali is the most widely used language in business in Bangladesh, as it is the official language of the country. It is also the national language of Bangladesh and is widely spoken throughout the country.

Sinhala is the most widely used language in business in Sri Lanka, as it is the official language of the country. It is also the national language of Sri Lanka and is widely spoken throughout the country.

Nepali is the most widely used language in business in Nepal, as it is the official language of the country. It is also the national language of Nepal and is widely spoken throughout the country.