Throughout the Jak and Daxter series, a fictional, translatable language appears in a variety of environments known as Precursor. Official guides often included legends that enabled players to translate signs in the open world Haven City and other instances of Precursor, often discovering easter eggs in the process.

For an unknown reason, exclusively to the 2012 PlayStation 3 port of Jak II released in the Jak and Daxter Collection, a particular texture on a barrel of Dark Eco appearing in the Drill Platform stage was altered; originally, in the PlayStation 2 version of the game, the barrel read "Barrel of Eco" in Precursor. In the PlayStation 3 version, the same Precursor text now instead reads "Barrel of Shit", and was possibly changed to mess with anyone diligent enough to translate Precursor in the middle of gameplay.