What's traditional food at Oktoberfest?
Weissbier.
Here are the classics (I tried to write it on Bavarian):
Weisswurscht with sweet brown mustard and Brezn (Bavarian pretzel)
Fleischpflanzl (meatballs, often eaten in a bun)
Hendl (grilled chicken)
Haxn (pork hock/shank)
Leberkaas (literally: Liver-cheese), bavarian butchery speciality, contains neither liver nor cheese
Obazda (bavarian cheese speciality with Camembert, onion, paprika, caraway, butter and sometimes also beer)
Reiberdatschi (potato pancake)
Ripperl (smoked pork chop)
Semmelkneedl (dumpling made of bread, salt, eggs and parsley)
Steckerlfisch (fish grilled on a skewer)
Wammerl (pork belly, often smoked)
Zwetschgendatschi (flat yeast-dough with a thick layer of plums)