Hi Hexxar , I'm french and remember having loc issues on Cooking recipes in the past using Manufac, maybe I could recommand you to try "Skillet" which has strong new options Manufac hasn't and so far working perfectly without bugs. A very good alternative for us french.
A long, long time ago (more than 2 years i think ...) i helped FuBar_tcgTradeskills author to have its addon work with the french locales for first aid.
I really dont remember what we did, but it worked :D
You should drop an eye in the code, maybe??