1. Mandarin Chinese: 939 million
2. Hindi: 602 million
3. English: 379 million
4. Spanish: 534 million
5. Arabic: 274 million
6. Bengali: 265 million
7. Portuguese: 257 million
8. Russian: 154 million
9. Japanese: 128 million
10. German: 78 million
Important Note: This list only accounts for native speakers. If we include second language speakers, the ranking would change, with English likely taking the top spot due to its global influence.