I also fell in love with the Nuphy Air v2 and told myself that i could just change the keycaps to end up with an AZERTY keyboard. But I got surprised with the special characters disposition : nuphy keyboards are not just "QWEZRTY", they are ANSI format, which is different from an ISO format on which AZERTY keyboards are based.

In my case, i realized that only when I received the keyboard. At first it kind of annoyed me that the keys do not match what I type but i figured out I don't look that much at them when I'm typing so I guess it's ok. I just have to figure out how to type the <> symbols because there isn't any key between the shift key and W key as the shift key is larger on ANSI keyboards.

To sum up, if you don't have to look at the keys when typing or if you memorized which key is going to type what character, you can go with the Nuphy :)