Tell me how to correctly implement the translation in the likeness of Laravel

I have expanded the core of Lang.php

PHP Code:

class MY_Lang extends CI_Lang
{
    public $config;
    public function __construct()
    {
        parent::__construct();
        $this->config =& get_config();
    }
    public function lo()
    {
        $json_arr = array();
        $lan = substr($this->config['language'], 0, 2);
        $deft_lang = (get_cookie('lang') != $lan) ? get_cookie('lang') : $lan;
        set_cookie('lang', $deft_lang,93062220);
        $patch = APPPATH.'language/'.$deft_lang.'.json';
        if(file_exists($patch))
        {
            $json = file_get_contents($patch);
            $json_arr = json_decode($json, true);
        }
        return $json_arr;
    }
} 


and created a helper and added it to the auto connection.

PHP Code:

if ( ! function_exists('__')) {
    function __($mess, $var = '')
    {
        $CI =& get_instance();
        $lang = $CI->lang->lo();

        if (!empty($lang)) {
            if (array_key_exists($mess, $lang))
                $mes = $lang[$mess];
            else $mes = $mess;
        } else $mes = $mess;

        return str_replace("%%s%%", $var, $mes);
    }
} 


and call me in the right place like this.

Code:

<h1><?php echo __('Welcome to CodeIgniter!');?></h1>

Code:

<p><?php echo __('If you are exploring CodeIgniter for the very first time, you should start by reading the %%s%%.','<a href="user_guide/">'.__('User Guide').'</a>');?></p>

can see how it can be implemented even better.