I can tell you from personal experience that north Wales is very much full of towns like this.Wait... Llanfairpwllgwyngyll is a real place???? I figured @tj_PE was just being funny and mashing the keyboard.
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I visited in 2004 and we got lost on some back country B roads. This was before GPS and cell phones. We only had a high level map to figure things out. Academically I knew that Welsh was spoken in Wales but I thought it was always alongside English. What I didn't realize was that the signage is exclusively Welsh in north Wales! It was a real ***** trying to navigate when every town is "Ll" followed by a long string of random "ll", "g", "w", and "y", with occasional "f", "n", and "a" thrown in.
Ohh, that reminds me, y'know how in the US our highways all cardinal directions specified at the junctions so you know which direction you are going? Well it's not like that in the UK. You have to know local geography and town names to know if you are going N, S, E, and W.
It was frustrating at the time but now its a funny story to tell.