I just completed a survey on the influence of Hebrew and Yiddish among American Jews and non-Jews. One of the surveyors was a university professor mine and so I knew this was legitimate when a friend forwarded it to me. I heartily recommend taking the survey to anyone who uses Yiddish and Hebrew words in ordinary conversation.
"You are invited to participate in an interesting and entertaining survey about language. Essentially, we're asking about the spread of Yiddish (and some Hebrew) among English speakers in North America. We're turning to both Jews and non-Jews to answer questions like these: Who uses Yiddish words like "shmooze" and "daven" and phrases like "Money, shmoney"? Why do some people say "temple" while others say "shul"? Who prefers biblical names for their babies? Your responses will help us answer these and other questions, and you might learn something about yourself in the process. Please set aside 15-20 minutes, and click on this link to participate."