A quick Google came back with words and phrases banned by the US government. It's federal employee who are ordered not to use the words and phrases not individuals, but chilling nonetheless.
https://www.washingtonpost.com/national/health-science/cdc-g...
https://www.theguardian.com/environment/2017/aug/07/usda-cli...
That sounds more like a branding guideline for employees than censorship of a topic. But, as you said, this doesn't apply to normal citizens and presumably is done so that the spokespeople seem like they're on the same page.
It's not censorship, it's just stupid leadership and it's from ephemeral positions that our democracy can be used to reverse by putting people with sane policies in place.