I'm really amazed that it works so well. Thanks everybody

I can confirm that the Alice game is indeed in French if I put "French" in the steam properties. At least now I can play on Alice. Thanks for your help

Apparently, Dino Crisis ( GOG version ) has different setups for each language instead of having a single setup for all languages. That's why it doesn't work with the configurations (maybe?)

nix and mullvad vpn are installed on my steam deck under steamos 3.7 now but it's the same issue as before (Management RPC server or client error). Also I can open the Mullvad VPN GUI application which works but there is a message on the app :

Unable to contact the Mullvad system 
service, your connection might be unsecure. 
Please troubleshoot or send a problem 
report by clicking the "Learn more" button.

I don't know how to solve this issue

I found the mullvad-daemon , nix-daemon files in /nix/store/svf..............-user-environment/bin/mullvad , I don't know that's it. I copied and pasted both files into ~/.config/systemd/user/ then I open the terminal from ~/.config/systemd/user/ , I typed systemctl --user enable mullvad-daemon.service, it says : Failed to enable unit: Unit mullvad-daemon.service does not exist

I followed your advice but it still doesn't change

Locale is already " fr_FR " before I open an .ini file

[Configuration]
BasedOn=..\Engine\Config\BaseEngine.ini

[URL]
Map=AliceEntry.umap
LocalMap=AliceEntry.umap
TransitionMap=AliceEntry.umap
MapExt=umap
EXEName=AliceGame.exe
DebugEXEName=DEBUG-AliceGame.exe
GameName=American McGee's Alice 2
GameNameShort=Alice2

[Engine.Engine]
GameEngine=AliceGame.AliceGameEngine
bEnableColorClear=TRUE
DefaultPostProcessName=PostProcesses.PostProcess_Default
bEnableColorClear=TRUE
DefaultOnlineSubsystemName=
DynamicCoverMeshComponentName=
SubtitleFontName=WarfareFonts.Fonts.WarfareFonts_Chrom20
LoadingTextFontName=WarfareFonts.Fonts.WarfareFonts_Chrom20
bSmoothFrameRate=TRUE
MinSmoothedFrameRate=22
MaxSmoothedFrameRate=31
; NVCHANGE_BEGIN: Jiayuan - Apex Destructible DamageMap Parameters
ApexDamageParamsName=Nv_ApexDamageMap.AliceDamageMap
; NVCHANGE_BEGIN: Jiayuan - Apex Destructible DamageMap Parameters
LanguageRegistryPath=Software\EA Games\Alice Madness Returns
bSuppressMapWarnings=true

[Engine.FilesToNotCacheToHD]
; Use ALL CAPS for filenames
; Avoid cacheing all 30mb+ binks
+File=C1_111.BIK
+File=SOTD.BIK
+File=C1_116.BIK
+File=C3_315.BIK
+File=C1_1103.BIK
+File=C2_2102.BIK
+File=C4_BM.BIK
+File=C5_BM.BIK
+File=C2_223.BIK
+File=C3_312.BIK
+File=C4_412.BIK
+File=C3_3101.BIK
+File=C6_614.BIK
+File=C3_BM.BIK
+File=C4_482.BIK
+File=C3_BM.BIK
+File=C2_2101.BIK
+File=C2_243.BIK
+File=C6_617.BIK
+File=C2_233.BIK
+File=C6_6111.BIK
+File=C1_BM.BIK
+File=C2_BM.BIK

[FullScreenMovie]
;+SkippableMovies=Intro_SH.bik
;+SkippableMovies=TechLogo_Short.bik
;+SkippableMovies=Intro_Nvidia.bik
+AlwaysLoadedMovies=LoadingMovie
+LoadMapMovies=LoadingMovie
+bShouldStopMovieAtEndOfLoadMap=True
+DelayCountAfterMapLoaded=60
+ForceFadingInDuration=0.0
+LoadingTextX=570.0
+LoadingTextY=120.0
+SkipEALogoTime=6.0

[Engine.PackagesToAlwaysCook]
+Package=AliceEntry
+Package=CHAR_ArcheTypes
+SeekfreePackage=CH_Alice_Hatter
+SeekfreePackage=CH_Alice_Water
+SeekfreePackage=CH_Alice_Oriental
+SeekfreePackage=CH_Alice_Queen
+SeekfreePackage=CH_Alice_Doll
+SeekfreePackage=CH_Alice_Caterpillar
+SeekfreePackage=CH_Alice_Cheshire
+SeekfreePackage=CH_Alice_Chess
+SeekfreePackage=CH_Alice_QFlesh
+SeekfreePackage=CH_Alice_WRabbit
+SeekfreePackage=CH_Alice_MadHatter

[Engine.StartupPackages]
+Package=PostProcesses
+Package=WarfareFonts
+Package=Nv_ApexDamageMap

[Core.System]
MaxObjectsNotConsideredByGC=33476
+Paths=..\..\%GAME%Game\Content
+Paths=..\..\%GAME%Game\__Trashcan
+LocalizationPaths=..\..\%GAME%Game\Localization
SavePath=..\..\%GAME%Game\Save
+Extensions=umap
SeekFreePCPaths=..\..\%GAME%Game\CookedPC
SeekFreePCExtensions=xxx
SizeOfPermanentObjectPool=0
PackageSizeSoftLimit=500

[UnrealEd.EditorEngine]
EditPackagesOutPath=..\..\%GAME%Game\Script
FRScriptOutputPath=..\..\%GAME%Game\ScriptFinalRelease
+EditPackages=%GAME%Game
AutoSaveDir=..\..\%GAME%Game\Autosaves
InEditorGameURLOptions=

[UnrealEd.UnrealEdEngine]
bSmoothFrameRate=TRUE
MinSmoothedFrameRate=22.000000
MaxSmoothedFrameRate=31.000000

[SystemSettings]
Locale=fr_FR
UseVsync=True
ResX=1280
ResY=720
MotionBlur=True
TEXTUREGROUP_Character=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_CharacterNormalMap=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_CharacterSpecular=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_Cinematic=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_Effects=(MinLODSize=128,MaxLODSize=512,LODBias=1)
TEXTUREGROUP_Lightmap=(MinLODSize=512,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_Shadowmap=(MinLODSize=512,MaxLODSize=1024,LODBias=0,NumStreamedMips=3)
TEXTUREGROUP_RenderTarget=(MinLODSize=1,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_Skybox=(MinLODSize=512,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_UI=(MinLODSize=512,MaxLODSize=1024,LODBias=0,MipGenSettings=TMGS_NoMipmaps)
TEXTUREGROUP_Vehicle=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_VehicleNormalMap=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_VehicleSpecular=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_Weapon=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_WeaponNormalMap=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_WeaponSpecular=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_World=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_WorldNormalMap=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_WorldSpecular=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_MobileFlattened=(MinLODSize=8,MaxLODSize=256,LODBias=0)
TEXTUREGROUP_WorldImportant=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_WorldImportantNormalMap=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_WorldImportantSpecular=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
DynamicTonemapping=True
AmbientOcclusion=False

[SystemSettingsEditor]
ResX=1280
ResY=720
TEXTUREGROUP_Character=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_CharacterNormalMap=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_CharacterSpecular=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_Cinematic=(MinLODSize=256,MaxLODSize=4096,LODBias=0)
TEXTUREGROUP_Effects=(MinLODSize=128,MaxLODSize=512,LODBias=1)
TEXTUREGROUP_Lightmap=(MinLODSize=512,MaxLODSize=4096,LODBias=0)
TEXTUREGROUP_Shadowmap=(MinLODSize=512,MaxLODSize=4096,LODBias=0,NumStreamedMips=3)
TEXTUREGROUP_RenderTarget=(MinLODSize=1,MaxLODSize=4096,LODBias=0)
TEXTUREGROUP_Skybox=(MinLODSize=512,MaxLODSize=2048,LODBias=0)
TEXTUREGROUP_UI=(MinLODSize=512,MaxLODSize=4096,LODBias=0)
TEXTUREGROUP_Vehicle=(MinLODSize=256,MaxLODSize=2048,LODBias=0)
TEXTUREGROUP_VehicleNormalMap=(MinLODSize=256,MaxLODSize=2048,LODBias=0)
TEXTUREGROUP_VehicleSpecular=(MinLODSize=256,MaxLODSize=2048,LODBias=0)
TEXTUREGROUP_Weapon=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_WeaponNormalMap=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_WeaponSpecular=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_World=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_WorldNormalMap=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_WorldSpecular=(MinLODSize=256,MaxLODSize=1024,LODBias=0)
TEXTUREGROUP_MobileFlattened=(MinLODSize=128,MaxLODSize=4096,LODBias=0)
TEXTUREGROUP_WorldImportant=(MinLODSize=256,MaxLODSize=2048,LODBias=0)
TEXTUREGROUP_WorldImportantNormalMap=(MinLODSize=256,MaxLODSize=2048,LODBias=0)
TEXTUREGROUP_WorldImportantSpecular=(MinLODSize=256,MaxLODSize=2048,LODBias=0)

[Windows.StandardUser]
MyDocumentsSubDirName=Alice Madness Returns
MyDocumentsFSubDirName=Alice Retour au pays de la folie

[DebugInfo]
BuildTag=DefaultUser
ShowKismetLog=FALSE
ShowScreenLog=FALSE
HideDynamicTonemapping=FALSE

[AliceGame.AliceGameEngine]
Alice1Path=..\..\..\Alice1\bin
GIsSpecialPCEdition=TRUE

Unfortunately there is no .exe file "language_setup.exe" in my Dino Crisis game folder, it will be great if someone who can provide me a file, maybe it will work. I followed your advice, despite the modifications, still failure I also tried to use the same configurations of dino crisis and alice on PC under Windows, it's the same result as on Lutris

Do you mean that this command nix-env -iA nixpkgs is not recommended ? For what reason ? If it's not recommended, how do I uninstall an app that I installed packaged with nix-env ? Then I add a configuration.nix with this command kate /etc/nixos/configuration.nix , then I copy and paste

  environment.systemPackages = [
    pkgs.mullvad-vpn
  ];

is it correct ? Because I don't have a "nixos" folder in my /etc/. After creating a .nix configuration for a Mullvad package, how do I install this app ? I have already executed this command nix-shell -p mullvad-vpn before but it gives a result

Error: Management RPC server or client error  

Caused by:  
         0:   transport error  
         1:   No such file or directory (os error 2)  
         2:   No such file or directory (os error 2)  

Now, I'm hesitating to remove all the scripts from A.B.T because it's not the same as Cryo Utilities and SDWeak. I found out how to remove the scripts in a blog by A.B.T. Why did I want to remove the scripts from A.B.T.? Because I saw the instructions from SDWeak saying "Before installation, be sure to remove Cryo Utilities if it was previously installed.". Will it be the same case as the A.B.T. scripts? Will there be any issues if I install SDWeak?

Yes, I ran the A.B.T. script by denis-g but did not install Cryo Utilities

Explain to me why I should do a ‘revert’ by A.B.T in the Medium post if I want to install SDWeak ?

What is "ananicy-cpp" ?

I think I will opt for the second solution. Nix is ​​not installed under SteamOS 3.7, how to correctly install nix with mullvad vpn without having issues ?

I followed his instructions up to step 3 but when I typed nix --version , it says bash: nix : command not found . Did I make a mistake ?

I didn't understand what you mean. This command allows to install on Steam Deck under SteamOS to improve SD performance, I used this guide in the past. But I don't know how to uninstall it, that's what I want

I don't think it will be possible because I have never made a backup on my Steam Deck