I would guess that a good many American GA pilots never have any meaningful contact with British GA, especially since there's a huge moat between the two countries that automatically prevents going back and forth with each other in any small aircraft.

However, Canadian pilots most certainly do, and vice versa. We have stricter standards for radio communications, and minor differences in air law and air traffic control classes. On top of that, the kind of flying we do in Canada has a higher reliance on small aircraft in the first place, having large distances between small outposts of civilisation. There are entire workplaces that only operate on a fly-in, fly-out basis, and the kind of aircraft that shuttle such workers in and out, are those that were designed specifically for these circumstances, in our country.

We also have air medic services that are very similar to Australia's Flying Doctor. We just don't have quite as cool a name for it.