private function hide_promo() {
		$hide_promo = get_transient( 'yoast_i18n_' . $this->project_slug . '_promo_hide' );
		if ( ! $hide_promo ) {
			if ( filter_input( INPUT_GET, 'remove_i18n_promo', FILTER_VALIDATE_INT ) === 1 ) {
				// No expiration time, so this would normally not expire, but it wouldn't be copied to other sites etc.
				set_transient( 'yoast_i18n_' . $this->project_slug . '_promo_hide', true );
				$hide_promo = true;
			}
		}
		return $hide_promo;
	}