I myself do not know French. We all know that many ballet terms are in French and you can buy ballet manuals that give you a translation. Out of curiosity, I decided to check the translation with a program that comes on the Mac. Here is what it spit out at me:
sur le cou-de-pied: on the instep
I would love some input from anyone that knows a little French, or anyone that knows how reliable the mac's translater is. Thanks for reading!