This blog post "Azure brings big data, analytics, and visualization capabilities to U.S. Government" indicates that:
We are also announcing a preview of Cognitive Services in Azure Government. We have enabled scenarios such as audio and text translation into other languages as well as facial (gender and age) and emotion recognition with Computer Vision and Emotion.
However, I don't see it in the UI, what am I missing? How can I use Cognitive Services in Azure Government.