Cognitive Services Text Analytics' sentiment analysis v3 now supports 10 languages including English, Japanese, Simplified and Traditional Chinese, Spanish, Italian, French, Portuguese, German, and Dutch. Sentiment v3 is available in the following regions: Australia East, Central Canada, Central US, East Asia, East US, East US 2, North Europe, Southeast Asia, South Central US, UK South, West Europe, and West US 2.
For more information on the API and the request and response payloads, see the API documentation.