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I understand that you are encountering an issue is due to the limitations of the free pricing tier (F0) of the Azure AI Services. The Detect Language operation under the Text Analytics API (v3.0) may not be supported with your current subscription key and pricing tier (AIServices.S0). To resolve this issue, you can consider upgrading to a paid pricing tier that supports the Detect Language operation.
You can check the available pricing tiers and their features on the Azure pricing page to determine which tier would best suit your needs. can you please refer these https://learn.microsoft.com/en-us/azure/ai-services/language-service/language-detection/quickstart?pivots=programming-language-python&tabs=windows#setting-up
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