It is. But I think like Ciudad de Mexico is Mexico City, this is also Juarez City. Other criterias are first letters of words that are key words for recognition specific geografic places. Because of that Mt. Everest is in "E" quiz for example. And yes, Jersey is just Jersey.
You don't just translate Ciudad Juarez. It starts with a C. Mexico City has been translated because it's the capital and the largest city, but Ciudad Juarez stays. I recommend you change it to Chihuahua.
I found that out on the quiz with the Letter D for Denali.