it's not elk, it's moose in Scandinavia (different animal!),
Not necessarily.
Alces alces is called elk in UK English, but moose in US English. However in the UK, we do recognise and sometimes borrow the US word, because the USanians have polluted the word elk by applying it to a dfferent animal. Elk is the older name for this animal, taken from the Germanic, moose being from the Algonquian, which has came into (first US) English much more recently than the word elk.
Cervus Canadensis is called elk or wapiti in US English, but only wapiti in the UK. Indeed, we Brits would tend to think that calling them elk is an annoying mistake, that gave the word elk a confusing aspect it did not previously have. Wapiti is a perfectly good name for them, so why can't we stick to that and reserve the name elk for true elk?
There is a general habit throughout the colonies, not just English speaking colonies, of the colonists borrowing European words and applying them to the local flora and fauna, thus confusing the rest of us when they bring that word back.
For example, in England, a robin is a long established name for a small bird in the flycatcher family, but Americans apply the name to a kind of thrush, and Australians apply it to the Petroicidae, a family of entirely different birds. And in Spanish, roble is the normal European Spanish word for an oak tree, but in Chile and Argentina, where there are no oaks, the name is used to refer to Nothofagus obliqua, a member of the beech family. This has resulted in the tree being called, in English, "roble beech".
Though of course borrowing names is an old habit. In UK English, the name laurel has been appropriated from something we actually grow, and now call a bay tree, to refer to a member of the cherry family, which is annoying because there is a "laurel family" of trees, Lauraceae, which laurel is not in. We have also appropriated the name sycamore, orginally a middle eastern fig, to apply to a maple tree. So we can hardly complain when Americans borrow it again to apply it to a plane.