Placed? No.
Classed? No.
Fictional? *some muttering in the audience* The words on the card do not denote something fictional as such, but there are definitely many fictional connections.
Myth or Legend? No, but again there are many connections to myth and legend.
Unique? No.

Circular involvement? No. I mean, I suppose it could, but not usually, and not in any way that would be helpful for finding the answer.

Connected to language? I think the best answer is No. While there are some connections, there is neither a direct nor a necessary link to language.

Connected with religion? Sometimes, but by no means necessarily. (That is a more positive answer than my first instinct, but I am being influenced by a particular dictionary definition I am looking at right now.) The question does also prompt me to say that I should perhaps have said "...and also ANIMAL/VEGETABLE/MINERAL/ABSTRACT connections".

Thought? No.
Mental Activity? I suppose, with a broad definition of mental activity, the answer is yes, but I'm not sure that is helpful.
No Man's Land? No.
Perhaps there is a bit more of a connection to language than I implied before, simply because this is most often made manifest through language (see "fictional connections").