Fascinating. I thought the signs were a bit more standartized than that. From what I can tell those(red-yellow/white-yellow) are supposed to be the same sign, but with different enough meaning to cause trouble, ie if I were to travel through Sweden and stayed for the night in a hotel with one of those I’d go right in without a second thought. Not a fan of clarification signs though, as in the same scenario I wouldn’t be able to read them, it’s actually one thing I find very annoying riding around caucasus countries that all information signs are not only in different languages, but in different scripts as well.