public static function parseLanguageList($languageList = null, $options = []) {
		$defaultOptions = [
			'forceLowerCase' => true,
		];
		if (!is_array($options)) {
			$options = ['forceLowerCase' => $options];
		}
		$options += $defaultOptions;

		if ($languageList === null) {
			if (!env('HTTP_ACCEPT_LANGUAGE')) {
				return [];
			}
			$languageList = env('HTTP_ACCEPT_LANGUAGE');
		}

		$languages = [];
		$languagesRanks = [];
		$languageRanges = explode(',', trim($languageList));

		foreach ($languageRanges as $languageRange) {
			$pattern = '/(\*|[a-zA-Z0-9]{1,8}(?:-[a-zA-Z0-9]{1,8})*)(?:\s*;\s*q\s*=\s*(0(?:\.\d{0,3})|1(?:\.0{0,3})))?/';
			if (preg_match($pattern, trim($languageRange), $match)) {
				if (!isset($match[2])) {
					$rank = '1.0';
				} else {
					$rank = (string)(float)($match[2]);
				}
				if (!isset($languages[$rank])) {
					if ($rank === '1') {
						$rank = '1.0';
					}
					$languages[$rank] = [];
				}

				$language = $match[1];
				if ($options['forceLowerCase']) {
					$language = strtolower($language);
				} else {
					$language = substr_replace($language, strtolower(substr($language, 0, 2)), 0, 2);
					if (strlen($language) === 5) {
						$language = substr_replace($language, strtoupper(substr($language, 3, 2)), 3, 2);
					}
				}

				if (array_key_exists($language, $languagesRanks) === false) {
					$languages[$rank][] = $language;
					$languagesRanks[$language] = $rank;
				} elseif ($rank > $languagesRanks[$language]) {
					foreach ($languages as $existRank => $existLangs) {
						$key = array_search($existLangs, $languages);
						if ($key !== false) {
							unset($languages[$existRank][$key]);
							if (empty($languages[$existRank])) {
								unset($languages[$existRank]);
							}
						}
					}
					$languages[$rank][] = $language;
					$languagesRanks[$language] = $rank;
				}
			}
		}
		krsort($languages);
		return $languages;
	}