text to speach - choose region dynamically

hi, tts sdk requires working against a specific region. I'd like to be able to work with some abstraction where I don't have to state the region, (I don't know in advance which region is most perphered- my location varies).

I saw azure has something similar to what I need called "front door" service, but I don't see it is suggested for the TTS but for other use cases. 

any build in support from Azure for this requirement? 

(I guess I can implement something myself but rather get a ready service that does this)

thanks in advance!