It's important to highlight the risks again: downloading files from unknown sites can lead to security issues. I should also remind them that modifying the game might void any warranty or support from the developers, though PES 2017 is quite old and likely past its support period.
: If you download a version of the file from a significantly different Data Pack (DLC) than your current game version, it can occasionally cause the game to crash at the loading screen or result in "dummy" text appearing in menus. dt41-eng-all.cpk pes 2017 download
: It contains the audio database for the primary English-speaking commentators. It's important to highlight the risks again: downloading