This blog explains how to setup postman to test cognitive service translator.
Pre-requisites: Cognitive service translator, access to postman
Open postman, add a new post request and add following configurations.
If the translator access limited to VNet use following URL format.
URL : https://your-translate-service-name.cognitiveservices.azure.com/translator/text/v3.0/translate?to=fr
ex: https://my-demo-translator.cognitiveservices.azure.com/translator/text/v3.0/translate?from=en&to=fr