$meta = apply_filters( 'signup_create_blog_meta', array( 'lang_id' => 1, 'public' => $public ) ); // deprecated
$meta = apply_filters( 'add_signup_meta', $meta );
$meta = apply_filters( 'signup_create_blog_meta', array( 'lang_id' => 1, 'public' => $public ) ); // deprecated
$meta = apply_filters( 'add_signup_meta', $meta );