Error 400000 on Getting Text from PowerShell Variable

[dborchers-gc]

I totally have no idea what's happening here. Hope someone here can help me. That makes no sense and its frustrating...

I tried to reach the text translation API in PowerShell. This are my Global Variables:

$TranslatorKey = "e54902*******" # You need a valid key for Microsoft Translator
  
$global:BaseUri = "https://api.cognitive.microsofttranslator.com/translate?api-version=3.0"
$global:Headers = @{
    'Ocp-Apim-Subscription-Key' = $translatorKey
    'Ocp-Apim-Subscription-Region' = 'germanywestcentral' # added (change if needed)
    'Content-type' = 'application/json; charset=UTF-8'
}

When i use the Text directly inside my Code it works:

$LanguageCode = "de"
$textJson = @{
    "Text" = "Users may see some meetings scheduled in Mexico time zones are displaying with the incorrect time."
} | ConvertTo-Json
$Body = "[$textJson]"

$Uri = "$($global:BaseUri)&to=$($LanguageCode)"
$Status = Invoke-RestMethod -Method Post -Uri $uri -Headers $global: headers -Body $Body

But if i want to use a Variable with the Text inside, it throws the Error in the Title:

$temp = "Users may see some meetings scheduled in Mexico time zones are displaying with the incorrect time."
$LanguageCode = "de"
$textJson = @{
    "Text" = $temp
} | ConvertTo-Json
$Body = "[$textJson]"

Ive checked absolutely everything and have no idea what's the difference. I really Hope someone can help me.