I do not know, but if you find out, kindly let me know too 😛
@julian I set the default language to zh-CN in my site. However, it still shows the home page to English. I understand it set its language based on browser preference language. You can see my site at c.mainnote.com which "register" and "login" were showing "English". I wonder if there is a flag to configure the whole site into default language.