Invoice template - Amount in words doesn't include currency

Invoice template - Amount in words doesn't include currency

Hello,

We need to show the total amount in words for each invoice. When we checked the option "Show amount in words " in the total section of the invoice template, it only shows the amount with no currency.
As shown in the screenshot below:


The language we use is French and the currency is DZD (dinar algérien). 
It should show : six cent soixante-deux dinars algériens et soixante-quinze centimes

Is it possible to add the currency? Or maybe use a custom function?

Thank you,
Regards