Hi,
Thanks for the report.
We will see to "secure" the text in order to avoid the issues when the apostrophe is used. So even if someone change the translation to put that special character, it will not break the page.
So in the file "administrator/components/com_hikashop/views/product/view.html.php" you can replace (twice)
array('name' => 'popup','icon'=>'upload','alt'=>JText::_('ADD_TO_CART_HTML_CODE'),'url'=>$url),
By
array('name' => 'popup','icon'=>'upload','alt'=>JText::_('ADD_TO_CART_HTML_CODE', true),'url'=>$url),
It should activate the "jsSafe" from the Joomla Text, and avoid the javascript issue.
Regards,