Jetpack Comments Change Placeholder Text

The comment form is generated from another domain via the iframe. While I was accessing the iframe using jQuery content() it returned me Permission denied to access. It means the Jetpack is Cross Site Scripting protected and you cannot edit the placeholder.

techhipbettruvabetnorabahisbahis forumutaraftarium24eduseduseduseduedusedusedusedueduedus