Installing a language pack is the first step to internationalizing your store. Remember, the language pack will translate Magento's interface, not your product information.
First, we need to get the extension key for the language pack.
1. Point your browser to http://www.magentocommerce.com/magento-connect.
2. Search for the language pack of your choice:
5. Click on the GET EXTENSION KEY button. The extension key is displayed:
6. Select and copy the extension key. You might want to keep this window open while you complete the next part.
Now, it is time to install the extension:
1. In another browser tab or window, log in to the administrative interface of your Magento.
2. Select System | Magento Connect | Magento Connect Manager.
3. You will be prompted to log in to the connect manager. Enter your Magento administrator username and password, and...