http://www.wpbeginner.com/wp-themes/how-to-add-a-gdpr-comment-privacy-opt-in-checkbox-in-wordpress/
https://premium.wpmudev.org/blog/customizing-wordpress-comment-form/
http://www.wpbeginner.com/wp-themes/how-to-add-a-gdpr-comment-privacy-opt-in-checkbox-in-wordpress/
https://premium.wpmudev.org/blog/customizing-wordpress-comment-form/