Hi, am not overly sure. The none drive side screws in clockwise and the threads look to be around 1mm apart - is that french or english? the bottom bracket cup is 14mm wide.
The frame comes with the original cups and axle, bearings etc. I have just taken them out for cleaning, although to the makers credit the Nervar axle cups and bearings just need a clean, not bad after 30 yrs or so.
I hope this helps.
If you need any more info or can help determine the anglo french identity further then feel free to offer some guidance I am always interested to learn!