This is quite handy if your planning on doing multilingual websites and want to know how big the markets are for each individual language.
Total GDP per language area in 2008 in billion US dollars at market exchange rates (as a % of world GDP in parenthesis) >> population in 2008 (UN figures for the countries and territories making up each language area, not the actual number of speakers) :
1- English: 19,837+ (32.6%+) >> 481.7 million+
2- Chinese: 5,210 (8.6%) >> 1,358.1 million
3- Japanese: 4,924 (8.1%) >> 127.2 million
4- German: 4,504 (7.4%) >> 96.4 million
5- Spanish: 4,364 (7.2%) >> 416.8 million
6- French: 4,097 (6.7%) >> 426.7 million
7- Italian: 2,332 (3.8%) >> 60.3 million
8- Russian: 1,959 (3.2%) >> 189.0 million
9- Arabic: 1,914 (3.1%) >> 342.1 million
10- Portuguese: 1,913 (3.1%) >> 249.2 million
11- Dutch: 1,267 (2.1%) >> 24.6 million
12- Korean: 973 (1.6%) >> 72.2 million
13- Malay-Indonesian: 931 (1.5%) >> 263.7 million
14- Turkish: 729 (1.2%) >> 71.5 million
15- Hindi-Urdu: 570 (0.9%) >> 720.8 million
Source
http://www.unilang.org/viewtopic.php?f=1&t=29191&p=580667
