How can i change language to Fallout 3?

I've installed Fallout 3 GOTY from Epic Games. I want to change the language from english to italian but canging the language from ini files dosen't work

I'm writing this here because I notice that in the game folder I've notice that files necessary for the game are only in the folder "Fallout 3 GOTY English" and not every other language folder like "Fallout 3 GOTY Italian" even if both have "Data" folder inside. So I'm wondering if the language of the game depends on Epic Games/Heroic download and how I've to do to have Italian subtitles