I have to keep stressing the fact that the direct translations I'm brining up aren't actually translated incorrectly. They do have a tendency to be used incorrectly, though, so there are plenty of instances where it will be incorrect. Like this example:
Just like Aunties and Uncles, any person that is maybe a little bit older than you can be called "older sister" or "older brother." This especially includes cousins. While there is a word for cousin, it is much more common to hear an older female cousin referred to as, "older sister," directly translated.
Once, back in the days of the Squirrel Class,