[Closed] Translation of search page with plug in hotel booking of motopress

Background of the issue:
I am trying to translate the availability search page of the hotel booking plugin on my site hidden link. When a user books 3 nights, the English text shows ' for 3 nights', but in French, it shows ' par nuit'. 'Par nuit' means per night. The text is not translated for the number of nights. I have checked on WordPress but cannot find where to change that. I think it was working before, so I don't know if it's due to an upgrade of the plugin.

Symptoms:
The French translation on the availability search page shows ' par nuit' instead of ' for 3 nights'.

Questions:
Where can I change the translation for the number of nights in the MotoPress Hotel Booking plugin?
Could the issue be related to a recent upgrade of the plugin?