What I know: Portuguese rating started out with Roman numerals like IV, V, and then switched to French. 6, 7, even though V doesn't fit exactly on French 5. This may be connected to the ratings in Brazil. There is a lot of English influence, so UK ratings aren't unexpected.
This area: https://www.thecrag.com/climbing/portugal/geres/area/6277954353 ... has quite a bit of weird grading that seems only half supported. Origin: https://montanhaescalada.com/pe-do-cabril-vias-de-escalada/
What I know: Portuguese rating started out with Roman numerals like IV, V, and then switched to French. 6, 7, even though V doesn't fit exactly on French 5. This may be connected to the ratings in Brazil. There is a lot of English influence, so UK ratings aren't unexpected.
It would be nice if this was supported.