The Dt20-eng-win.cpk file is a core data container used in the PC versions of the PES series (notably PES 2017 through PES 2021).
dt20_eng_win.cpk is a critical data container used in the Pro Evolution Soccer (PES) Dt20-eng-win.cpk
file to ensure that new players or teams added by the mod have the correct English callnames. Fixing Missing Audio: The Dt20-eng-win