The usual term on signs etc. is Public Conveniences.
They will be labelled Gentlemen and Ladies and usually marked with internationally recognized symbols.
Conversationally they are referred to as toilets or (more commonly) loos.
Restroom may be understood but the American expression bathroom is not used in the same way.
If you mean a room where people take a bath (or a shower), they call it a bathroom. However, if you say 'bathroom' and you mean a room with no bath or shower, but just a toilet and a hand-basin, they call it a toilet, or a WC (short for water closet), or a loo.
In England a bathroom can be referred to by any one of several 'terms'. It should also be noted that what actually constitutes a bathroom may vary widely, but the most notable difference is that some bathrooms may contain a bath, shower, washbasin AND a toilet ... and possibly a bidet, all within the same room, whilst others do not contain a toilet at all, which is usually in a separate adjacent room - the logic being that family members can use the washing facilities without preventing access for other family to the toilet.
A bathroom is STILL called a bathroom in England, and in most cases if you asked to be directed to one, you would expect to find the toilet within. 'Loo' is specific to the toilet itself, as in 'Can I use your loo', or 'Where is the loo' ... or 'I'm desperate for the loo!' ... basically, 'loo' is just a euphemism for 'toilet' that has fallen into common usage.
Conversely, going to the 'loo' will almost always lead you to a bathroom with washing facilities!
Much of deciding what is appropriate usage comes down to who you may be talking to ... a (very much) older person may still refer to it as 'the netty', or a 'WC' (for Water Closet) ... yesterday I heard a High Court judge correct a barrister (in open Court!) ... the barrister had refereed to a 'toilet' ... the preferred option for the judge was a lavatory! ... technically correct, but rarely used in normal conversation, unless perhaps one wants to be seen as absolutely 'correct' in polite society ... in which case, and such enquiry is likely to be made quietly and discretely, so the actual language used is largely irrelevant!
We call the convenience room the loo, the toilet and the WC, calling it the restroom or bathroom is too euphemistic for British tastes. We call the room where we take a bath the bathroom.
Toilet. Restroom must be the silliest euphemism ever invented.
A bathroom is a bathroom if it has a bath in it. If it doesn't have a bath in it, it is called a toilet, or colloquially, a loo.
it is called a toilet
Toilet
loo
People in England call the bathroom the loo. I have no idea why.
We call it the bathroom faucet.
What will you do if a child met accident in the bathroom
banos
European.
A call of nature is a euphemism for the urge to visit the bathroom.
A person who steals clothes from public bathroom is a theif.
plumber!
This is a hippie term from hidin in the bathroom to smoke weed.
People from London NEVER call it 'London England', they just call it London. Only people from the USA call it 'London England'.
The home that I am currently renting has no bathroom mirrors. Where is the best place to go to get bathroom mirrors? Do I need to call someone to install them or can I do it myself?
A bathroom is called a bathroom in Ireland. What is meant when you say "Bathroom" in Ireland is a room that has a bath. In some countries, it can mean a room that does not have a bath, but does have a toilet. Some countries are a bit uncomfortable about using the word toilet and so they use the word bathroom even when it does not have a bath in it. There is no problem about using the word toilet in Ireland, so a room without a bath, but with a toilet in Ireland is called a toilet. In Ireland, calling a room a bathroom when it does not have a bath in it, does not make sense. If there is a bath and a toilet in the room, then it is called a bathroom. Even then, someone might say they are going to the toilet, when their intention is to relieve themselves.