Language file Dutch latest version incorrect

-- HikaShop version -- : 3.2.2
-- Joomla version -- : 3.8.3
-- PHP version -- : 5.6
-- Error-message(debug-mod must be tuned on) -- : Language file Dutch latest version incorrect

I have just updated Hikashop and updated the language file to the latest version.
Now I suddenly get the following picture, see appendix

Hello,

You can activate temporally the Joomla language debug mode in order to have details about language errors.

Regards,

How can I turn it on then
Or is that the error report of Joomla itself

Hello,

It is the Language debug mode and it's part of the Joomla global configuration.
It's related to the Joomla core.

Regards,