Multilingual System lang files

Hello,

I found the following issue in Codeigniter.

Initial situation:
I have a multilingual site and using language class of CI. Everything is working fine for own language files.

Problem:
I want to translate content of (/codeigniter/system/language/english/form_validation_lang.php) and tried following: Created translated file /codeigniter/system/language/german/form_validation_lang.php
In controller I use $this->lang->load('form_validation', 'german'); for loading language file, but I still get english translation for form errors.


My workaround at the moment: Created dummy (almost empty) file /codeigniter/system/language/english/form_validation_lang.php.
Also created /codeigniter/application/language/german/system/form_validation_lang.php
 and load $this->lang->load('system/form_validation', 'german');

Does anyone know what is the right way to work with translated system lang files? Documention at https://github.com/bcit-ci/codeigniter3-translations is not helping me.