Hello.
Hello.
Thank you for interest to the Booking Calendar.
1) At the Booking Calendar Business Small and Business Medium versions are possible to make the bookings for the specific time slot.
Please note, if some visitor will reserve the specific time slot at selected date at specific booking resource (calendar), this timeslot become unavailable for the other visitors at this selected date in this booking resource.
Please read more about it here: http://wpbookingcalendar.com/overview/#times
2) Booking calendar is load the interface in a language of your active locale. You can set specific locale of your website at the config.php file in root of your website. Since WordPress update 4.1, its possible to change the language (locale) of website at the WordPress > Settings > General page in your admin panel. Please read more about translation of plugin here: http://wpbookingcalendar.com/faq/make-translation-of-wp-plugin/
If you are using your website in several languages, then please check this info : http://wpbookingcalendar.com/faq/several-languages/
3) You can check the costs of premium versions at this page: http://wpbookingcalendar.com/features/
Kind Regards.