The problem is that the line doesn't tell what change does it affect. In the place of "Would you like to display... Y[Y] N[N]", I should have (for example) "Disable helmets animations Y[Y] N[N]?" (well, I assume. I will check for later components). What I find strange is that it has not been reported by french translators or other players who use Complete edition from GOG.
edit: I checked, the problem is, apparently, for the 5 first choices.
Thanks for the replies.