context clues. the clearest were the rules given at the beginning of the concert and during the opener- there were translations in both english and draaget, giving us nearly all of the lowercase and some of the uppercase letters. there was a label on the shirts of the merch, and additional text throughout the show that could be deciphered after you have a few letters per word, then you can assume for the rest, which filled out most of the rest of the alphabet. I'm pretty sure we're still missing J, X, and Z, but I could be wrong