Yes you can, simply;
- Click on the Settings cog and select Account
- Tick the check box to Enable Google Translate for theory test questions
- Click on the drop down arrow to select from a list of over 60 languages
- Scroll to the bottom of the page, and click the Save button
Warning: There will be no foreign language voiceovers or interpreters provided when you take your final test. This feature should be used to help you practise and assist your learning only.