Hi Yves,
While editing a booking, I switch the status to sg else (for example: Participation assured), and tick the "Notify participant (Booking confirmation) " on the top right corner.
A notification e-mail is sent out (good), but it is always in English, however the first confirmation e-mail was different (in many cases by me, Hungarian). Could you somehow save the language code for the first confirmation e-mail, and use it for later communication?
Thanks,
Marci