Problem :
For an unknow reason, French players can't run the game and make Flawlesswidescreen to work. If the game is in Full French (voice and text), Flawlesswidescreen will not recognise the game and still block at this status :
"Searching for Mass Effect 3 process, please configure desired settings and launch the game."
Solution :
For French players, here are the trick to make Flawlesswidescreen working and have French voice (you have to do this everytime you launch the game...) :
Explanation in French :
Explication en Français ici :
http://forum.hardware.fr/hfr/JeuxVideo/PC/effect-ultrawidescreen-francais-sujet_193680_1.htm#t13061384Explanation in English :
1 : Go to Windows, type Regedit, and find : HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\BioWare\Mass Effect 3
2 : In the lign "Locale" modify "fr_Fr" in "en_US" (without quote). Keep this window open. We are going back to it later.
3 : Open flawlesswidescreen and configure it like you want or like this guy
https://youtu.be/HMiYtAWSmqY?t=424.4 : Run the game throught Origin. Flawlesswidescreen will recognize it because the game is in English now.
5 : Come back to the desktop without closing your game (press "Alt Tab" keys on your keyboard for exemple).
6 : Modify the value "Locale" to fr_FR in the Registry Editor.
7 : Come back to the game, go to Narrative option, and select Français in voice option.
Enjoy a full French game with Flawlesswidescreen enable !