Even armed with number of guides, I was at a loss to read most menus or street vendor food signs in Mexico City. So, here's a list of the words that you may encounter in the city - feel free to do a web or dictionary search, my explanations (where available) are only approximate!
al mojo de ajo - fish with garlic?
alambre - meat, onions, peppers, bacon, all grilled, on a tortilla, optionally with hot layer of cheese on top
arranchera - thin sliced grilled steak, with spices and cilantro
cafe de olla - black coffe, with sugar, and maybe sweet spices
cecina - beef, thin sliced, salted, dried in the sun
chicharron - pork rinds - boil pork skin then bake it and/or fry
chicharron de queso - at Charco de las Ranas, crepe-like cheese dish
chuleta - pork chop
churros rellenos - con chocolate, cajeta o lechera - filled churros, with chocolate, or milk-caramel, or sweetened condensed milk
costilla - T-bone steak (?)
cuerno de jamon
enfrijoladas - tortillas dipped in mashed black beans, served with chile de arbol hot sauce
estilo español - spanish style, for example, chocolates estilo español
frijoles - beans
- charros - "cowboy" beans - long cooked, with bacon, chorizo, onions, cumin, oregano, chillies, etc
- de la olla con totopos - pinto beans, with fried tortillas (?)
- refritos - refried beans
machitos de carnero - sheep intestine, boiled, braided, and then fried
maciza - boneless pork meat
milanesa - sandwich, with thin slice of meat, and possibly avocado, onion, chillies, etc
nopal - fleshy part of cactus
pasta seca, pasta seca surtida - cookies?
picante normal, or mas picante - normal hot spice, or more hot spice
pizza - rebanada, personal, familiar - pizza - slice, small, or regular
quesadilla comalera - antojitos? at cafe tacuba