The more you move it around, the longer it will take to fully heal. If you were to immobilize the joint with an athletic wrap/tape, it would probably be fine. Without that, I’d imagine it would be hard to keep it from moving while swimming.
So… exactly the same as the US
Merriam-Webster’s been adding stuff to the dictionary long before it’s even really embedded in the lexicon lately. Probably trying to stay relevant.
They all follow that general form because the same company (Match Group) bought all of the different dating sites and changed them to the form that makes them the most money.
To be fair that’s pretty much what I do here in the US