Change Teams Language from PowerShell

changeTeamsLanguage.ps1

$configPath = "$ENV:APPDATA\Microsoft\Teams\desktop-config.json";
$cookiesFilePath = "$ENV:APPDATA\Microsoft\Teams\Cookies"
$cookiesJournalPath = "$ENV:APPDATA\Microsoft\Teams\Cookies-journal"

$teams = Get-Process Teams -ErrorAction SilentlyContinue
if ($teams) {
  Stop-Process -Name Teams -Force  
}

Start-Sleep -s 5

try {
  Remove-Item $cookiesFilePath -Force
}
catch {}

try {
  Remove-Item $cookiesJournalPath -Force
}
catch {}

$teamsConfigJson = (Get-Content -path $configPath) | ConvertFrom-Json 
$teamsConfigJson.currentWebLanguage = "de-CH"
$teamsConfigJson | ConvertTo-Json -Depth 10 | Set-Content -Path $configPath