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$languages = $this->model_localisation_language->getLanguages();

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		$url_path = explode('/', rawurldecode($_SERVER['REQUEST_URI']));
		$query = $this->db->query("SELECT * FROM `" . DB_PREFIX . "seo_url` WHERE keyword = '" . $this->db->escape(end($url_path)) . "' ");
		
		if($query->row){
			$this->session->data['language'] = $this->model_localisation_language->getLanguage($query->row['language_id'])['code'];
		}

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. "' ");

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. "'");

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...
    <input type="hidden" name="code" value="" />
	{% for language in languages %}
	  <input type="hidden" name="redirect[{{ language.code}}]" value="{{ language.redirect }}" />
	{% endfor %}
...

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class ControllerCommonLanguage extends Controller {
	public function index() {
		$this->load->language('common/language');

		$data['action'] = $this->url->link('common/language/language', '', $this->request->server['HTTPS']);
		$data['code'] = $this->session->data['language'];

		$this->load->model('localisation/language');
		$data['languages'] = array();
		$results = $this->model_localisation_language->getLanguages();

		foreach ($results as $result) {
			if ($result['status']) {
				$data['languages'][] = array(
					'name' => $result['name'],
					'code' => $result['code'],
					'redirect' => $this->getRedirect($result['language_id'])
				);
			}
		}



		return $this->load->view('common/language', $data);
	}

	private function getRedirect($language_id){
		if (!isset($this->request->get['route'])) {
			$redirect = $this->url->link('common/home');
		} else {
			$url_data = $this->request->get;
			unset($url_data['_route_']);			
			$route = $url_data['route'];
			unset($url_data['route']);
			$url = '';
			if ($url_data) {
				$url = '&' . urldecode(http_build_query($url_data, '', '&'));
			}
			$curr_lang = $this->config->get('config_language_id');
			$this->config->set('config_language_id',$language_id);
			$redirect = $this->url->link($route, $url, $this->request->server['HTTPS']);
			$this->config->set('config_language_id',$curr_lang);
		}
		return $redirect;
	}
	
	public function language() {
		if (isset($this->request->post['code'])) {
			$this->session->data['language'] = $this->request->post['code'];
		}

		if (isset($this->request->post['redirect'][$this->request->post['code']])) {
			$this->response->redirect($this->request->post['redirect'][$this->request->post['code']]);
		} else {
			$this->response->redirect($this->url->link('common/home'));
		}
	}
}