I have set my default language for my portal to Chinese(Taiwan), but the base language for the Language Switcher is still the English. If I change the Language Switcher selection to Chinese(Taiwan) manually, as soon as I browse to any product page, the language will change back to English.

Since my web site will only be in Chinese(Taiwan) for now, so the solution I took is to disable the English in Host->Language page. That way, the Language Switcher will only have Chinese(Taiwan) as its only option.

But I know it shouldn't work this way, and I am just wondering if you have any idea what cause this problem.

Thanks!