HI! I just ran into the same issue. However, I was able to install it on workstations by changing the start-process to start-processasactiveuser command from the wdk

I used your code, I just changed that one command 

I also changed the temp folder path to C:\windows\temp\automox

$tempFolderPath = Join-Path -Path "C:\Windows\Temp" -ChildPath "automox"
Write-Output "Creating temporary folder at $tempFolderPath"
New-Item -ItemType Directory -Force -Path $tempFolderPath | Out-Null

# Download Language Tool setup executable
$url = "https://languagetool.org/download/windows-app/LanguageTool-latest.exe"
$destinationPath = Join-Path -Path $tempFolderPath -ChildPath "$($url.Split('/')'-1])"
Write-Output "Downloading LanguageTool setup executable from $url to $destinationPath"
Invoke-WebRequest -Uri $url -OutFile $destinationPath

# Install Language Tool using the silent installation switch (/S)
Write-Output "Installing LanguageTool silently"
Start-ProcessAsActiveUser -Path $destinationPath -ArgumentList "/S", "-dir", "%APPDATA%\LanguageTool\"

# Remove the temporary files
Write-Output "Removing temporary files from $tempFolderPath"
Remove-Item -Recurse -Force -Path $tempFolderPath

This was the output 

After running the worklet, I could see the program installed on my PC

Hello Malvarez,

Good news. 
I’m going to test now.
thank for your reply.

I publish the result just after.

I think i have a problem with the rights to install.

Error Start-ProcessAsActiveUser command. The error indicates that this command was invoked as a non-SYSTEM user, which can cause issues as certain privileges 

Do you have a screen shot of the error? I just installed it on a test PC with a non admin user and it was successful 

Hello Maalvarez,

I use your code. 

 

After some modification of your remediation code : 

 

#REQUIRES -Version 2.0

<#

.SYNOPSIS

    This script checks if LanguageTool is installed.

.DESCRIPTION

    This script checks for the presence of LanguageTool on the system.

.NOTES

    File Name       :LanguageTool_Install_Test.ps1

    Author          :Automox

    Prerequisite    :PowerShell V2 over Windows 7 and later

#>

# Handle Exit Codes:

trap {  
    $host.ui.WriteErrorLine($_.Exception); 
    exit 90 
}

function LanguageTool_Install_Test {

    <#

    .SYNOPSIS

        This function checks if LanguageTool is installed on the system.

    .DESCRIPTION

        This function queries the installed files for LanguageTool and returns a code indicating

        whether it's installed or not.

    .EXAMPLE

        LanguageTool_Install_Test

    .NOTES

    #>

    $languageToolInstalled = Get-ChildItem -Path "C:\Program Files" -Filter "LanguageTool-*" -Recurse | Select-Object -First 1

    if ($languageToolInstalled) {
        # LanguageTool found, exit with code 0.
        exit 0
    }
    else {
        # LanguageTool not found, exit with code 1.
        exit 1
    }

}

# Call the LanguageTool installation test function.
LanguageTool_Install_Test

and remediation code
 

#REQUIRES -Version 2.0

<#

.SYNOPSIS

    This script checks if LanguageTool is installed.

.DESCRIPTION

    This script checks for the presence of LanguageTool on the system.

.NOTES

    File Name       :LanguageTool_Install_Test.ps1

    Author          :Automox

    Prerequisite    :PowerShell V2 over Windows 7 and later

#>

# Handle Exit Codes:

trap {  
    $host.ui.WriteErrorLine($_.Exception); 
    exit 90 
}

function LanguageTool_Install_Test {

    <#

    .SYNOPSIS

        This function checks if LanguageTool is installed on the system.

    .DESCRIPTION

        This function queries the installed files for LanguageTool and returns a code indicating

        whether it's installed or not.

    .EXAMPLE

        LanguageTool_Install_Test

    .NOTES

    #>

    $languageToolInstalled = Get-ChildItem -Path "C:\Program Files" -Filter "LanguageTool-*" -Recurse | Select-Object -First 1

    if ($languageToolInstalled) {
        # LanguageTool found, exit with code 0.
        exit 0
    }
    else {
        # LanguageTool not found, exit with code 1.
        exit 1
    }

}

# Call the LanguageTool installation test function.
LanguageTool_Install_Test

I have this 

 

After refresh of the agent, language tool is not visible on the software installed on the machine.

Best,

Doomer

I was able to recreate your error message

Is the Automox agent running as system on your target PC? 

Hello Maalvarez,
I verify now and i back to you.
Doomer

Hello,
I have the good right, i dont understand why it’s not functional.
Doomer