From LOTR-TCG Wiki

French format includes sets 1-6, Reflections, and sets 11-14. It also has its own X-List, allowing some cards that aren't a problem in that format and banning some strong cards, self-recurring site manipulation cards, and some NPE sites.

French format is supported in GEMP. More info is available in The Last Homely House forum thread.

Block Formats
Official Formats Fellowship Block Towers Block King Block War of the Ring Block Hunters Block
Towers Standard
King Standard
Movie Block
War of the Ring Standard
Unofficial Formats
Non-Block Formats
Official Formats
Unofficial Formats Austrian Culture Shock French Poor Man's PC Errata