Change the “Allow comments” text for admin edit screen for custom post type?

You can fire filter hook gettext ( example available too ) to change default text Allow comments. in admin edit screen. Here another sample function:

add_filter( 'gettext','wpse221235_change_admin_cpt_text_filter', 1, 3 );
function wpse221235_change_admin_cpt_text_filter( $translated_text, $text, $domain )
{
    global $typenow;

    if ( is_admin() && 'Allow comments.' == $text && 'your-post-type' == $typenow )
        $translated_text = __( 'Allow reviews.', 'text_domain' );

    return $translated_text;
}

Of course, thanks @Sumit for point out, those sample just give the OP the direction, the same approach with WordPress example. If we need a more generic approach, please visit @toscho answer, there are a lot of discussion about it, and we can figure out the good approach to change text translation.