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.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)