Actually, is the THIRD. The second is English. The first is CHINESE.
Yes, CHINESE. More than 2 billion speakers.
(By the way, a billion is 1,000,000,000 for Americans.
In Spain and some other European countries, a billion(billón) is 1.000.000.000.000)
The funny thing is that English is a basic
subject in the schools of almost every single country. But some people just refuse to use it.
If anyone want to use the Public chat, they should use English. If they want to use other languages, they should use Private or Alliance chats, or things like external Messengers (Google Talk, MSN Messenger, Yahoo Messenger, etc...).