Feedburner emails not arriving in correct language

I am trying to install a subscription service to receive the daily blog by email. I have installed Fedburner on all four sites through widgets, but it only works as it should in English and Italian on https://www.eugenedemazenod.net and https://www.eugenedemazenod.net/ita.
I have had to remove the ones on https://www.eugenedemazenod.net/fra and https://www.eugenedemazenod.net/esp because instead of the email arriving in French and Spanish as it should, it arrives with the English or Italian text. How do I get these two sites to do what they should?
What I have done in each case is cut and paste the text that opens up on Feedburner > Publicize> Subscription Form Code, and then put it in the relevant language widget.
Thanks
Frank