Yes. All system services, including iCloud preferences, appear in French depending on your selected locale.
For French-speaking users or those needing a fully localized French environment (Français), finding the specific file macos-sierra-10.12.6-french.iso is a common but tricky quest. Unlike Windows, Apple does not officially distribute macOS as ISO files. However, creating or obtaining a reliable ISO for virtualization (VMware, VirtualBox, Parallels) or legacy bare-metal installs is essential. macos-sierra-10.12.6-french.iso
# Create a blank disk image hdiutil create -o /tmp/SierraFrench -size 8000m -volname SierraFrench -layout SPUD -fs HFS+J hdiutil attach /tmp/SierraFrench.dmg -noverify -mountpoint /Volumes/SierraFrench Copy the installer resources sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/SierraFrench --nointeraction Unmount and convert to ISO hdiutil detach /Volumes/Install\ macOS\ Sierra hdiutil convert /tmp/SierraFrench.dmg -format UDTO -o ~/Desktop/macos-sierra-10.12.6-french.iso mv ~/Desktop/macos-sierra-10.12.6-french.iso.cdr ~/Desktop/macos-sierra-10.12.6-french.iso Unlike Windows, Apple does not officially distribute macOS
VBoxManage modifyvm "SierraFrench" --cpuidset 00000001 000306a9 00020800 80000201 178bfbff VBoxManage setextradata "SierraFrench" "VBoxInternal/Devices/efi/0/Config/DmiSystemProduct" "MacBookPro11,3" VBoxManage setextradata "SierraFrench" "VBoxInternal/Devices/efi/0/Config/DmiSystemVersion" "1.0" Installation proceeds identically to bare metal. The ISO will boot the EFI environment in French. Many French users still own MacBook 5,2 (2008) or Mac mini 3,1 (2009). Sierra 10.12.6 is the last OS for these models. The ISO will boot the EFI environment in French
Add -v keepsyms=1 and npci=0x2000 to your Clover/OpenCore boot arguments. Also ensure ApfsDriverLoader.efi is included.