Change Pay Now Button

Hi,

First, thank you for you amazing plugin that should help me a lot.

Now the issue i’m facing up. Since my website is for the french speaking people, I would like to change the Pay Now button with a “Payer” version. Of course, it does exist on Paypal website : https://www.paypalobjects.com/fr_FR/i/btn/btn_paynowCC_LG.gif

So how could I do to make the switch ?

Thank you again, kind regards.