From the Super Mario Wiki
Yold Desert is an area in Lineland from Super Paper Mario. As its name suggests, it is a desert area that is covered in sand. Throughout the desert, there are clues that the Ancients left on signposts on how to advance and reach Yold Ruins .
The name "Yold" is a combination of "ye" (old way of saying "the") and "old", and the language of the Yold Signposts is Early Modern English.
 Chapter 1-3: The Sands of Yold
Following his trek through Yold Town, Mario found himself in the Yold Desert. The desert was covered in quicksand and the spikeless living stones, Bald Clefts. Not much occurred through the desert voyage, though Mario encountered many new enemies such as Boomboxers and Jawbuses.
After learning from a statue of Fracktail to jump ten times while beneath a red palm tree (similar to the puzzle when Mario had to walk around one in Dry Dry Outpost in Paper Mario), Mario encounters none other than Count Bleck's minion, O'Chunks. O'Chunks stomps on the ground making the door to the next part of the desert innacessable. A battle then ensues, when the player defeats him, Mario will be able to advance to the next area.
Eventually, after following the guidance of one or two additional statues, Mario found a blue platform. After the player presses the and buttons at the same time when Mario is on the platform, the entrance to the Yold Ruins was revealed in the form of a slider puzzle. The opening of the gate is similar to that of the Hawkmouths from Super Mario Bros. 2.
 Names in Other Languages