From the survey's Workspace, click on the 'Advanced' button (along the top menu), followed by 'Multilingual'. Choose your target translation language, or add your chosen language if it is not displayed. Enter the translated text in the right-hand column next to the source language (left-hand column). The translation includes the Eval&GO interface items such as buttons etc.
Once the translation is complete, you can repeat the translation process with your next language