1. Mandarin Chinese: Spoken by over 1 billion people, primarily in China.
2. Hindi: Spoken by over 600 million people, mainly in India.
3. English: Spoken by over 370 million people as a native language, and by over 1.5 billion people as a second language, making it the most widely spoken language globally.
4. Spanish: Spoken by over 500 million people, primarily in Latin America and Spain.
5. Arabic: Spoken by over 300 million people, mainly in the Middle East and North Africa.