Fully translatable you can translate into any language. Also front-end (Booking form) support multiple languages translation at same time. Appoint users can switch front-end into language accordingly. On the top of the booking page user can see number of available languages ( its depends upon admin set language list in admin label area ).
if you want to remove some flag on top of the booking page then follow the path and set it accordingly. Admin->Settings->Manageable Form Fields ( enable/disable accordingly ) . With using this you have hide whole language flag.
If you want to remove some particular flag. Then please follow the path and set it accordingly. With using this option hide particular flag on Booking page screen. Path : Admin->Settings->Labels->Choose Language ( Enable / Disable accordingly. )