I really love watching ballet I guess because my daughter is a ballet dancer- it has it's own vocabulary based on French terminology.  
I did not know the vocabulary was french - are there any examples
Well one example is adage which means slowly - so you are to do the move slowly
Ok.  What do they call it when they do the tiptoe turns
Glossary of ballet
Because ballet became formalized in France, a significant part of ballet terminology is in the French language.
A.
A À la seconde.
() (Literally "to second") If a step is done "à la seconde," it is done to the side.
A À la quatrième.
() One of the directions of body, facing the audience ("en face"), arms in second position, with one leg extended either to fourth position in front ("
°) and half (180°) turns are possible for some types of turns
History.
Ballet is a type of performance dance that originated in the Italian Renaissance courts of the 15th century and later developed into a concert dance form in France and Russia. It has since become a widespread, highly technical form of dance with its own vocabulary based on French terminology. It has been globally influential and has defined the foundational techniques used in many other dance genres. Becoming a ballet dancer requires years of training. Ballet