There are two types of menu translation books here, the Marling Menu Master Series, which starts with typical menu items in the native language sorted by course, and tells you what they are in English. They are thin, easy to take to dinner, and include a lot of translations. The World Food Series from Lonely Planet are more detailed books about the history, regional cuisine, food customs and wine. They're handy to bring shopping with you. The dictionary isn't as complete as Marling, however.
For food and wine afficionados, World Food France can almost stand on its own as a travel guide. Detailed info on the wine regions of France, shopping areas, a culinary dictionary, plus pictures and recipes just in case you want to try things out when you get home.
This rather dated version (but how long has French cuisine been around?) has been criticized for its use of "entree" in the American sense, as the main course. The entree is, of course, the entrance to the meal in France, the appetizer. A thin quarter inch thick, easy to take with you to that French restaurant you always wanted to try.
I used this guide a lot on my trip to Spain. It was not only useful for normal shopping and restaurant menu translations, but it let me in on the local, regional foods I might try, as well as the best foods that Spain had to offer--like the best Spanish cured Ham (Iberico de Bellota).
Here's the thin volume you take to Spanish restaurants with you. Very high ratings for this volume.
Italian food is very regional, and this guide will tell you what to eat where, including a 72 page Italian food language guide.
Every region of Italy has it's favorites. Unfortunately, the menu master won't tell you which food you should eat where. But it's a pretty good book for understanding what's on most Italian menus.
If you're like me, the German language is pretty much incomprehensable. This is a good guide to what's out there, and since there's no World Guide to German food, you might have to be content with Menu Master's offering.
Who's an expert on Portuguese cuisine. It's more complex than you might think, and this guide got me through the rough parts. Not as well written as the Spanish World Food guide, but it'll do, especially as there's no Menu Master for Portugal.
Yes, there's more to Irish cuisine than potatoes. Get pictures as well as commentary on Irish culture and social traditions.
Mostly you'll just wander into a Greek kitchen and point to what looks good to you. But if you want background on the historical cuisine that you'll find bubbling in pots in front of you, get this guide to Greek cuisine.