We are still waiting on a few internal dependencies before we can complete this request.
OdedSam Maurus commented
Unless I'm missing something, CultureInfo for en-HK is not available for .NET code running on Azure App Service ("CultureNotFoundException: Culture is not supported. en-HK is an invalid culture identifier"). On Azure Cloud Services, the latest guest OS includes this culture and many others.
I guess this is related to automatic OS update management, which Azure App Service should do automatically. I'm uncertain as to what factors are involved for making the latest .NET cultures available in App Service. Will these cultures be made available soon, or is there some reason why they're not supported?
Note that I'm talking about "out of the box" cultures, NOT custom cultures. For custom cultures I understand that one would be best to go for a Cloud Service approach where a task with elevated privileges would be required to register them.