For an Irish person, this sentence is quite amusing as ‘gick’ is slang for ‘poo’!
Is the Norwegian sentence saying that she walked to the toilet or that she used the toilet or both? I'm asking because in American English, "she went to the bathroom" is used both ways.
I think it can be used in both ways, I think I use it like that (I live in Norway).
If you want to indicate that she went to the bathroom/ restroom without indicating that she used the toilet you could say, "Hun dro på toalettet."
"på" is used with this meaning in idioms like "go to school" or "go to the toilet" and alongside "gå" (I can't think of any exception) .
No, you can't use multiple toilets at the same time. Unless it is an weird english thing that you say.
If the sentence refers to using a toilet, then it would have to be singular.
But if the sentence refers to travelling to the appropriate room, it's pretty common to use the singular or the plural in British English.
Which to use may depend on knowing whether there are multiple toilets in the room (eg "going to the toilet" in a private house; "going to the toilets" in a public building) although it isn't a strict rule.
The Norwegian sentence uses the singular noun. "The toilets" would be written "toalettene".
I wonder why so many people disliked my comments ^^ They don't like that English has variation :P
I really think you would only use "the toilets" for odd reasons. If you want to use it, you would go to "the toilet". You might go "to the toilets" if you were going to clean them or check whether someone was there, and there were multiple toilets. Otherwise it's odd and not something I think I've heard anyone say in 50-something years of being a native Brit.