The halal

I went out for breakfast with a Muslim colleague. Our mission is to ensure pork is not being served. When we ordered a ham sandwich we asked the store keeper in Vietnam what kind of ham was that. The store keeper replied in a broken English, it's chicken ham. My Muslim friend was doubtful and she mumbled.. Please make sure it's chicken else I will end up in Yellll (unclear). I went back to her and said did you mean "health"? She said no no it's not health reason but HELL reason!