Codeigniter 4: Get value from BaseController to custom helper

Seems get_instance() is no longer working in Codeigniter 4. But I need to get some value from BaseController to my custom_helper. Here is my code snippet:
BaseController.php

Code:

<?php namespace App\Controllers;
class BaseController extends Controller
{
protected $helpers = ['custom'];
public function initController(...) {
  parent::initController(...);

  $myconfig = config('MyConfig');
  $this->languages = $myconfig->languages;
  $this->selected_lang = $myconfig->site_lang;
  $lang_segment = $this->request->uri->getSegment(1);
  foreach ($this->languages as $lang) {
    if ($lang_segment == $lang->short_form) {
      $this->selected_lang = $lang;
      $this->lang_base_url = base_url() . $lang->short_form . "/";
    }
  }
}
}
// Here I need to pass ($this->selected_lang) value to my custom_helper.

custom_helper.php

Code:

<?php
if (!function_exists('trans')) {
    function trans($string)
    {
        $language_translations = get_translation_array($this->selected_lang->id);
        // --> Here I want to get ($this->selected_lang->id) value from BaseController.
       
        if (!empty($language_translations[$string])) {
            return $language_translations[$string];
        }
        return "";
    }
}
function get_translation_array($land_id)
{
    .......
}

I'm not sure is it possible or not! I'm newbie in CI4. Please suggest if is there any solutions. Thanks in advance.

Pass it from the BaseController to your helper using sessions.

What did you Try? What did you Get? What did you Expect?

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