20. 199 600 1453 2501
4929
9318
14325
20357
29007
37862
47458
56000
Aug 2003 Feb 2004 Aug 2004 Feb 2005 Aug 2005 Feb 2006 Aug 2006 Feb 2007 Aug 2007 Feb 2008 Aug 2008 Feb 2009
over 50 000
learning communities
23. in almost 75 languages80 languages
Afrikaans
ﻋﺮﺑﻲ
Беларуская
Bosanski
Català
Čeština
Dansk
Deutsch
Ελληνικά
English
Español
Eesti
Euskara
ﻓﺎﺭﺳﯽ
Suomi
Filipino
Français
Gaeilge
Galego
ગ"જરાતી
עברית
>!ह#दी
Hrvatski
Magyar
Indonesian
Italiano
日本語
Khmer
한국어
Lietuvių
Latviešu
Māori
Norsk
Polski
Português
Română
Русский Sinhala
Slovenčina
Slovenščina
Samoan
SoomaaliShqip
Српски
Svenska
Tamil
Thai
Tagalog
Tongan
Türkçe
Українська
Vietnamese
简体中文
正體中文