Prestashop 1.7 CashOnDelivery missing translation

[squatter]

Hello, I have been looking everywhere to solve this, but with no luck.
 
I tried to translate module Cash On delivery, but in translations there are zero sentences to be translated. I have looked into module files, found one part of text to be translated in file ps_cashondelivery_intro.tpl:

{l s='You pay for the merchandise upon delivery' d='Modules.Cashondelivery.Shop'}

Other part of text is hardcoded in php file ps_cashondelivery.php:

->setCallToActionText($this->trans('Pay by CashonDelivery', array(), 'Modules.Cashondelivery.Shop'))

 
Could you please help me with modifying files so I could translate them?
 
Thanks a lot!
 
Eduard

[vekia]

this module can be ranslated from back office, take a look:

 

what you've got there instead?