The Diablo 4 Keeping the Old Traditions quest is just another of the emote-based puzzles that the game loves to throw at you. As with Traveler's Superstition and The Pilgrim's Footsteps, you'll stumble across a mysterious note while travelling in the Dry Steppes region that directs you to a specific location on the map and poses you a riddle.
If you find yourself getting overwhelmed by hordes of enemies then upgrading your healing potion is a good shout for survival, as is trying some Legendary crafting for better gear. Otherwise, here's the Diablo 4 Keeping the Old Traditions quest solution and what you have to do to earn those secret spoils.
Keeping the Old Traditions solution
During your travels through Diablo 4's inhospitable desert regions, you can find the Lonely Offering note in the Untamed Scarps area of the Dry Steppes. This marks the start of the Keeping the Old Traditions quest and reads:
"Though timeworn, you endure. Before your colourful kin, I say; Yes, I keep our traditions!"
Once started, the quest gives you a marker nearby in the Valley of the Strayed and if you travel there you'll find a big statue that, oddly, you can't interact with. So, how exactly do you solve the riddle? Like many of Diablo 4's quests, the riddle is literally asking you to say "Yes" to the timeworn statue, namely by using the "Yes" emote.
This is slightly trickier than other emote quests because you probably didn't know there was a "Yes" emote, since it doesn't feature in either of the emote wheels. To equip it, press E to open the wheel and then customise to add "Yes" from the list into the spare space you have in the expanded left wheel. Now, simply use the emote on the statue and a hidden chest will appear. Job well done.