This is quite an interesting question. We can say that there are definitely sites that offer hacks in French with hacktelecharger.fr being the latest one that hit the internet. The problem is that webmasters from all around the world may try to take advantage of your lack of knowledge and will try to trick you into download hacks that do not actually work. Some are even completely dishonest and will include viruses or malware in the files that you are about to download. It is very important that you pay close attention to the sites that you download anything from. Just focus on those that are recommended by proper authority figures in the gaming industry.
The problem with game hacks in French is that many fake hackers are interested in taking advantage of French people that do not know how to protect themselves. The truth is that all dishonest webmasters make a whole lot of money from the many different sites that they have in French. Never download hacks in French if you are not 100% sure that the resource is legit. Read reviews and recommendations so that you will not be taken advantage of. With just a little bit of patience it is a guarantee that you will find what you are looking for.