A modder by the name of Meekurukuru was able to make a mod to "decensor" the dialog that was altered by IFI in their last patch. This mod works for both the GOG and Steam versions of the game.

Links:
Reddit page for the mod: here

Nexusmods: here

Gamebanana: here

PC Gaming Wiki page: [url=https://www.pcgamingwiki.com/wiki/Neptunia:_Sisters_VS_Sisters#Decensor_Patch]here[/url]

EDIT: A̶t̶ ̶t̶h̶e̶ ̶m̶o̶m̶e̶n̶t̶,̶ ̶t̶h̶e̶ ̶p̶a̶t̶c̶h̶ ̶m̶a̶y̶ ̶c̶a̶u̶s̶e̶ ̶t̶h̶e̶ ̶g̶a̶m̶e̶ ̶t̶o̶ ̶c̶r̶a̶s̶h̶.̶
EDIT 2: This bug has been fixed in the V2 update of the patch.

The changes made in the 1.01 patch were terrible. Not only because it waters down certain characters like Blanc and IF, but the way the audio dialogue was changed is done in the most lazy way possible by poorly editing the existing lines or extracting those from older titles, and they were in no way re-dubbed at all. It's nice to see someone created a mod that restores the original lines that were heavily altered post launch, and while patch 1.01 doesn't necessarily ruin the game, it only delivers sabotage in quality more so than censorship. I understand why changes had to be made due to an error in the ratings description, but still.