form redirection

hi guys,

Hope you are all fine.
starting with CI, i have a quick question.
in my controllers, i have contact.php with this code:

PHP Code:

$this->email->from($sender_name,$from);
        
        $this->email->to('[email protected]');
         
        $this->email->subject('Contact Us');
        
        $this->email->message($template);
        
        $this->email->send();
        
        redirect('home'); 


my problem is the last line. i have a site in spanigh and english, how can i make rediction to spanish after submit ?
when we are in spanish and vice-versa?

thanks for your help