While creating a Microsoft Translator Service, we can opt for a specific region instead of global and pass the in the header section as value for key 'Ocp-Apim-Subscription-Region'.
As per this link (https://docs.microsoft.com/en-in/azure/cognitive-services/translator/reference/v3-0-reference), if we have the region as 'global' then we can use geographical based URL to force the translation requests being served the corresponding data center region.
If we select region as 'australiaeast' while creating the translator service and use base URL as 'api-nam.cognitive.microsofttranslator.com' (United States), currently the translation requests are getting processed successfully.
However, we need to know whether these translation requests are being served from 'australiaeast' or 'api-nam.cognitive.microsofttranslator.com' region. Please confirm.