You can add this to your Fresh Store Builder store by doing the following:
Click tools – change parameters
Select “Store Settings” from the tab on the left hand side
You can then turn on the “Show EU cookie consent” parameter.
Please note that you will not see the consent message if you are logged in to the store, and once a visitor accepts it they will not see the message again.
You can change the message that is displayed by clicking Content – View Pages then selecting the Cookie Consent page.
The text and the button text in the bar are translatable as normal by editing the TemplateText.php file