Mandarin Chinese 13.22%, Spanish 4.88%, English 4.68%, Arabic 3.12%, Hindi 2.74%, Portuguese 2.69%, Bengali 2.59%, Russian 2.2%, Japanese 1.85%, Standard German 1.44%, French 1.2% (2005 est.)

https://www.cia.gov/library/publications/the-world-factbook/geos/xx.html#People