When did films become movies?
Has always been in my life too (Canadian mother) but I am bilingual with movie/film and even open to 'fillum' owing to North Eastern relatives... 
plain clothes officers, CID, aren't usually addressed as just detective, but as detective sargeant, for example.
This does not reflect my experience in how they are referred to in a day-to-day sense. Using their full titles is seen as either formal or pretentious so they just use the term "detective".
I was working alongside them so I may have a more informal experience than those they want to intimidate a bit.
I know that CID are detectives and a rank might be Detective Constable, right the way up DCI, but, plain clothes officers, CID, aren't usually addressed as just detective, but as detective sargeant, for example.
Some forces like the Met seem to have ranking structures unlike other police forces.
police being referred to as 'detective' and I do find it jarring,
The UK police have this category of officer (detective) too - I have worked with detectives on some business criminal investigations in the UK.
This article explains the different ranks: en.wikipedia.org/.../Police_ranks_of_the_United_Kingdom
I notice that too, and police being referred to as 'detective' and I do find it jarring, I find it most on kindle books as opposed to paper ones, so wonder if its something to do with it being amazon?
It is derived from Latin, most commonly through the French term that was introduced into the UK in the 1700s:
www.rd.com/.../
The term stems from the Old French caper, per the Oxford English Dictionary (OED). “Cop is a verb that means ‘to seize,’ or when there are people to do it, ‘arrest,'”
I can't think of anything other than your suggestion about appealing to American readers but than you put off all the English ones.
I have posted this above too but here is an explanation of why:
What Google AI says:
So it's not even that it is poor research on an American authors part. It is an English writer. How bizarre. I can't think of anything other than your suggestion about appealing to American readers but than you put off all the English ones.
“it’s a fair cop.”
I don't think this is derived from the police
What novel is it?
It's one of Tim Weaver's but I am finding the same in other UK novels.
That sounds pretty poor on the authors part. If you are going to set a story in England, the language should represent that. What novel is it?
I hate it when authors do that.
I find it jars and suspends the 'suspension of disbelief'.
I think 'ah, so we have suddenly been transported to the US, have we?'
Ah that makes sense. Yeah, unfortunately I have practically zero relation to Native Americans. It’s a shame, since they had such an impact to our culture that many of our Midwestern towns are named after native words and names. I’ve never known someone with more than like a quarter Native American blood, and that is a horrifying shame.
When I was a child, it wasn’t known as going to the cinema or the Movies, it was always going to the pictures. I suppose movies came about with the advent of moving pictures.
One I’ve noticed creeping in is instead of replacing something, it’s becoming to ‘change it out.’
