public function metaAlternate($url, $lang, $full = false) {
		//$canonical = $this->Url->build($url, $full);
		$url = $this->Url->build($url, $full);
		//return $this->Html->meta('canonical', $canonical, array('rel'=>'canonical', 'type'=>null, 'title'=>null));
		$lang = (array)$lang;
		$res = [];
		foreach ($lang as $language => $countries) {
			if (is_numeric($language)) {
				$language = '';
			} else {
				$language .= '-';
			}
			$countries = (array)$countries;
			foreach ($countries as $country) {
				$l = $language . $country;
				$options = ['rel' => 'alternate', 'hreflang' => $l, 'link' => $url];
				$res[] = $this->Html->meta($options) . PHP_EOL;
			}
		}
		return implode('', $res);
	}