Would you consider making a Brazilian layout keyboard?
It is basically an ISO layout with a split right shift for “/” and “?”. Perhaps that could be achieved by moving the “Fn” key to the right block, close to the arrow keys.
Layout from wikipedia:
https://en.wikipedia.org/wiki/Portuguese_keyboard_layout#/media/File:KB_Portuguese_Brazil.svg
Congrats for the great project.
Yes Brazilian layout is possible! Please choose ISO International Layout and specify Brazliian layout in the notes section.
The layout legends will not exactly match your link however. Also there will be no front printing available.
Your keyboard layout should approximately resemble this layout, adjusted for F62 or F77:
https://upload.wikimedia.org/wikipedia/commons/2/2b/Brazilian_104-key_ABNT2_keyboard.jpg