[TYPO3] how to make content other lanuages in English?

[Bing Du]

Hi,

When I add a Text type element, I can see the Language drop-down list
which has [All], Default, Spanish and Chinese.  If I select Spanish and
save/close, the content doesn't show up in the browser.  If I change it
back to Default (which is English in our case), the content appears fine. 
So in order for other languages to work, what need to be done?  Where
should I go to check what's missing?  I had a look at our TS template and
found the following settings

### Setup Spanish
[globalVar = GP:L = 1]
config.sys_language_uid = 3
config.language = es
config.locale_all = es_US.utf8
page.config.language = es
config.htmlTag_langKey = es
[global]

### Setup Chinese
[globalVar = GP:L = 2]
config.sys_language_uid = 4
config.language = cn
config.locale_all = zh_CN.utf8
page.config.language = cn
config.htmlTag_langKey = cn
[global]

Thanks much in advance for any help,

Bing