More about this issue :
I've noticed by verifying "AppData\Local\Gas Powered Games\Supreme Commander Forged Alliance\Game.prefs" that the voice volume was OFF, while it was at MAX in the Options window in-game :
options = {
(...)
vo_volume = 0,
(...)
},
The localized voices are still muted in spite of my attempts to :
set the volume to the MAX from the Options window in-game.
click on [Apply].
click on [OK].
I've even thought I had to quit the game and launch it again after this change, to no avail.
I've openned game.prefs with NP++ and noticed the value was still vo_volume = 0,.
So I've changed it for vo_volume = 100,, but it's had no effect at all.
FA v1.6.6 's localized voices are definitely like "broken" since I installed FAF, even by running the game without FAF.
Help will be much appreciated.