To change your language setting in Terapeak, click on the user menu in the upper right corner of the screen. Select Settings from the drop down menu. Click on Edit next to Your Information. Choose a new language from the drop down menu then press Save. Once you commit your new preference, the interface will update with the language of your choosing.
Please note that certain text elements such as eBay usernames, product category names and listing titles are not affected by language settings.