Yeah, something like that. A more typical install uses just one rear red fog light. IIRC, on the Continent where they drive on the right side of the road, the single lamp will be on the left side of the vehicle's rear. This provides some degree of orientation so overtaking vehicles will pass on the left, versusd slewing around to the right (a really bad idea in the fog.)
In the UK, to compensate for their odd habit of driving on the left, the rear fog light is located on the right rear of the vehicle, encouraging overtaking vehicles to pass on the right.
For a vehicle like a Land Cruiser that gets around internationally more than most, a dual lamp configuration makes some sense, so I'm guessing that's what we're seeing here. If it was my truck, I'd wire in a switch that allows the proper side fog light to llluminate according to whose road system orientation is being used.