from: http://www.adobe.com/products/photoshop-elements/faq.html
Photoshop Elements and Adobe Premiere Elements offer the option to install the application in any one of many languages available.
If you would prefer to install a purchased product in a language other than the language you installed during your trial period, you can simply go back to the original installer (whether DVD or Electronic Software Delivery), install the correct language, and then enter your serial number.