If using an older launcher, "Repairing" the game files may trigger a download of the French pack.
Here are a few reliable sources where you can find the FIFA 14 French commentary data file: fifa 14 commentary french data file download link
are highly reliable as they are static mirrors of the original game data. Internet Archive Summary of Pros & Cons Review Score Audio Quality ⭐⭐⭐⭐⭐ Full retail-quality commentary from Mathoux and Sauzée. Availability If using an older launcher, "Repairing" the game