1) Go to page: http://docs.mongodb.org/manual/meta/translation/ (I arrived on this page by searching "Translation" on doc site.
2) Click on any of the language links such as Chinese or French

Expected:

Shows chinese or french version of the doc

Observed:

URL "cn.docs.mongodb.com" gets redirected to the default English page: http://docs.mongodb.org/manual/

Not sure if we auto-redirect based on user agent so I attached my browser agent information here:

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,/;q=0.8
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8,zh-CN;q=0.6
Cache-Control:max-age=0
Connection:keep-alive
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.116 Safari/537.36