public function getBestFromClient() {
		// get all language keys from client
		$client_langs = $this->getFromClient();

		foreach ($client_langs as $client_lang) {
			foreach ($this->_possible as $possible) {
				$l10n = $this->getL10n($possible);

				if (in_array($client_lang, $l10n['keys'])) {
					return $client_lang;
				}
			}
		}
	}