Here is an overview of the supported languages for South Park: The Fractured But Whole for all platforms:
 

	Interface	Full Audio	Subtitles
English	x	x	x
French	x	x	x
Italian	x	x	x
German	x	x	x
Spanish	x	x	x
Mexican Spanish	x	x	x
Polish	x		x
Portuguese-Brazil	x	x	x
Russian	x		x
Portuguese	x		x

All Audio Languages apart from English will be downloaded through the Day 1 patch via an internet connection.

This download will be automatic at the launch of your game.