Reported for: WooCommerce Multilingual & Multicurrency 4.11.0
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.
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.