codemix\localeurls\UrlManager::matchCode PHP Method

    protected function matchCode($code)
    {
        $language = $code;
        $country = null;
        $parts = explode('-', $code);
        if (count($parts) === 2) {
            $language = $parts[0];
            $country = strtoupper($parts[1]);
        }
        if (in_array($code, $this->languages)) {
            return [$language, $country];
        } elseif ($country && in_array("{$language}-{$country}", $this->languages) || in_array("{$language}-*", $this->languages)) {
            return [$language, $country];
        } elseif (in_array($language, $this->languages)) {
            return [$language, null];
        } else {
            return [null, null];
        }
    }