In my city, restaurants are typically very loud and staffed by someone who does not speak any of the languages that I do. There are ~ ten million people in my c

In my city, restaurants are typically very loud and staffed by someone who does not speak any of the languages that I do. There are ~ ten million people in my city with this problem, so Magic/Seamless/whatever is valuable because it prevents me from shouting, straining to hear, and repeating myself four times, only to find later that the order is wrong because I have no meaningful checksum to insure correctness.