Downloading legacy game files from third-party forums carries inherent risks:
The most common way to download commentary for FIFA 12 today is through "Total Conversion Mods." These are large packs created by communities (such as ModdingWay or various FIFA fan forums) that update kits, logos, and commentary.
For the PC version of FIFA 12, commentary is typically stored as .big files within the game directory. Fifa 12 Commentary Download Fixed
Modding communities have created patch files that replace the modern commentary with the FIFA 12 audio. Here is how to do it: