In my case, this only happens because I am kosher. Well not too strictly, I just avoid pork and sea food. But, if I take this in combination with the fact that English isn't my native language (I am from Russia), I would have to be asking whether various unknown words are vegetables (which they usually are but I have to ask to be sure) and I guess I am not comfortable asking too many questions. Perhaps I should buy english-russian dictionary and take it to the restaurants with me. And the other problem is that they don't have too much exotic food anyway, so its hard to find something truly new unless I go to someplace fancy which I can't afford going too often.