Thanks to Simon Guyart, "Shrapnel City" has now been localized into French.
What I uploaded is a package containing the French subtitles for
episode 1 (this means that to use the localization, episode 1 needs to
be already installed).
Download it from:
Alteredreality.altervista.org
To install, unzip the package into your Prey directory (the one
containing Prey.exe). The necessary subdirectories will be added and
the strings file will be created in its correct location.
A Spanish localization is also on the way and will be released