information after check payment and language

after select payment the only default active method by using check , i have a text that appear with this content ( see in the end) in the default language ' en) . The text can be found in backend using Menu Compoment -> Hikashop | system -> Payment Method | HikaShop check payment plugin .
the content is under the label "check information ". Is there a way that this content support language setting like joomfish / falang ?


""""""""""
Your order is now complete.
You can now send us a check with the amount of 100,00 € using the following information.
You can make out your check to: XXXX XXXX

And then, send your check to the address below :

XXXXXX XXXXXX

XX XXXX XXXXXX

XXXXX XXXXXXX

Once we receive it, we will confirm your order.
Do not forget to include the order number ( C2 ) at the back of the check so that we can match it to your order.
Thank you for your purchase.
"""""""""""""""""""""""""""""

I have many questions to custom this content
1- I do that from the Back End ? or by edit the php code that manage this content ? ( backend gui ?)
2- what is the format of that key htmlspecialchars(urldecode($msgpayement)),JText::_('msgpayement') $msgpayment ?
3- where is locate the ini file for translation ? \Jomla\language\fr-FR\fr-FR.ini Joomla\language\fr-FR\fr-FR.com_hikashop.ini
4- Can we use any ini file or ? the general or hikashop one ( end with hikamarket hikaserial hikashop )
5- The translation of this area use joomla default implementation or hikshop custom one ? ( hikashop one ?)

Regard's

Thank' for your reply .