Overview of the Issue
If a bookable product was partially translated (not in all secondary languages), it will not be translatable anymore as soon as it’s booked in a secondary language.
Workaround
This issue is fixed. Updating to the latest version solves it on your site, so you only need this workaround if you can’t update yet.
This happens because WCML needs to lock the booking time slot in the secondary languages. As a workaround, please use our Advanced Translation Editor (ATE) or translate your bookable products into all languages before making them available for booking.