Major languages of the world

Number of native speakers

1. Mandarin Chinese 836,000,000
2. Hindi 333,000,000
3. Spanish 332,000,000
4. English 322,000,000
5. Bengali 189,000,000
6. Arabic 186,000,000
7. Russian 170,000,000
8. Portuguese 170,000,000
9. Japanese 125,000,000
10. German 98,000,000
11. French 72,000,000
12. Malay 50,000,000

(from http://www.al-bab.com/arab/language/lang.htm). They seem to have combined all Arabic variants into one - whether that is legitimate or not, is an open question.

Another rating, also by number of native speakers:

1. Mandarin Chinese, 890 million
2. Spanish, 330 million
3. English, 320 million
4. Bengali, 190 million
5. Hindi, 180 million
6. Portuguese, 170 million
7. Russian, 170 million
8. Japanese, 125 million
9. German, 120 million
10. Wu Chinese, 77 million
11. Javanese, 75 million
12. Korean, 75 million
13. French, 72 million