Products not display in the language

I would like to display chinese as a second language for my open cart.

Tried install a language pack, it doesn't translate the content that I upload. The categories name, the products, the attributes and so on. Attached a print screen.

If i use google translate, it solve the problem however google has over 50 languages which I just need 1. Anyone know how to just have the language that I want?

Thanks for all help.

after you have added a language pack, you are required to add the different translations for the products in your admin panel

Thank you, this is great!!