Hmm… “pound” isn’t French at all. In the UK its use is from the old english ‘pund’, and that came from the German punda and its origins are, of course, Latin. So if the French use it, it’s probably because they hijacked it from the same sources.
And as for a bit of Union Flag waving – well actually that’s not difficult at all, when you consider that the true founding father of Metrication in all but name was John Wilkins – just read An Essay towards a Real Character and a Philosophical Language if you want to see why. And yes, this essay pre-dates Mouton’s efforts by two years. And anyway, if Mouton’s system had been adopted the metre would have been about 2 of the current ones, and they’re quite large enough already. I’m prepared to give Mouton the credit for using multipliers rather than different names for multiples of the same unit, but that’s about it.
A brief criticism of Wilkins’ ‘Essay’ may be found
here.
Some of my antecedents are French, and my middle name is essentially a French placename as well – but I’m still not sticking up for them!