Specifically, e-sound.afs (sometimes labeled as E_SOUND.AFS or 0_sound.afs depending on the region/language pack) is the master audio archive for the of PES 6. This file contains:
: If the game was installed in another language (e.g., French, using f_sound.afs ), renaming a downloaded e_sound.afs to match the target language file allows you to change the in-game commentary language. Installation Instructions