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Korean language fun fact n°1 :
시장 is the market
시장님 is the mayor of a town
님 is an honorific particle.
For exemple teacher is 선생
But Korean students will always call their teacher 선생님 omitting the honorific would be really rude.
Therefore "mayor" in Korean if literally translated would translate as "the market guy". Because mayors usually go to the market to increase their popularity.