DVDs released in France mostly have the Japanese and French audio, and french and Dutch subs. These Naruto DVDs have Japanese and English audio and English subs. The French releases are mostly found in France and the Benelux... and I bought my DVDs in the UK.

What I think happened is: Manga bought the Viz audio and the european rights for Naruto, subbed them themselves, screwing it up in the process.
What I thought was strange, was that the DVDs only credit the Japanese staff (after each episode in an unskippable staff roll.. VERY annoying)