There is nothing wrong with stating that French lost that battle. I have not heard that French found that celebration offensive.

I mean, the good thing with countries like France or England/UK is that you can pick ANY day, and we'll be able to find a victory and a defeat; been in too many wars for that not to happen.
What matters is both countries were able to survive despite their defeat. Eventually we all win some, lose some, and pretty much stayed the same

Louis,