Starting with their weird units for length (inches, feet, yards, furlongs), mass (ounces, pounds, stones, etc.), volume (fluid ounces, gallons), and their now mercifully extinct old currency (pounds, shillings, pence, three-pence, half-pence, farthing), where the conversions never seem to involve a simple factor of ten, the British seem to have, whenever given the chance, opted for a more complicated system when simple ones based on the factor ten stared them in the face. Note that the single word ‘pound’ could refer to a force, a mass, or money. Unfortunately they imposed these systems on their colonies and we had to suffer through them as students. Most countries have taken the sensible step of switching to the metric system, with the US being a notable holdout.
The same complicated thinking holds true for the way their country is structured and named, and this video tries to explain the complicated mess.
Donald Trump seems to find difficult even the major distinctions between England, Great Britain, and the United Kingdom. I can’t imagine what he’d do if told about all the other complications mentioned in the video. His brain might explode.