I chuckled :). How dare they use the metric system and degree Celsius? You got me curious about the WiFi channels though, but it looks like there is nothing specific to France: https://www.lairdconnect.com/support/faqs/what-channels-are-...
> How dare they use the metric system and degree Celsius?
Judgements about what they dare to do aside, isn't it fair to call those French? The metric system is based on the meter, a French unit. The International Prototype Kilogram (obsoleted only recently) was stored in France. While Celsius wasn't invented in France, a Frenchman flipped the scale (originally, freezing was 100 and boiling was 0). etc.
Not Invented Here syndrome doesn't mean that what you do invent here can't be good, that you can't sometimes get the rest of the world to agree with you, or that you abandon anything that's successful.