We have real estate brokers in the family the terms "full bath", "half bath" are commonly used.
Half baths are even worse, because they cannot hold water.
The term's usage appears to be spreading in the US, particularly among the folks I see in online videos taking apart panels and fixtures etc etc etc. There's plenty of euro-crap I'd prefer not to see here, but the term "mains voltage" is harmless enough. *shrug*
You might be a Trump "America first" guy but your man crush on Big Clive is stronger.