The most widely spoken language in the world is Mandarin Chinese, which is the official language of China and Taiwan and is spoken by over 1 billion people worldwide.
Mandarin Chinese is part of the Sino-Tibetan language family and is the most widely spoken form of Chinese. It is used as the primary language of instruction in schools and universities across China and is also widely spoken in other countries, such as Malaysia, Singapore, and Indonesia.
Other widely spoken languages include Spanish, English, and Arabic. Spanish is the second most widely spoken language in the world and is the official language of 21 countries. English is the third most widely spoken language and is widely used as a second language in many countries. Arabic is the fifth most widely spoken language and is the official language of 26 countries in the Arab world.