In MacOS, is there any way to have native Mac layout for ‘option-something’ special symbols in quoted-insert?

Question

With quoted-insert (C-q) I can enter ‘Option-something’ extended characters, but Emacs apparently understands them as ISO 8859-1. Meanwhile, MacOS has its own layout for these characters (changed with the input language or custom layouts), and there's a cheatsheet in the form of ‘Keyboard viewer.’

Is there any way to make Emacs use the same layout for M-something in quoted-insert as native applications do?

I could conceivably edit a keymap by hand to reflect the system one, but 1) I don't see a mention of a special keymap for quoted-insert, and 2) I'd prefer not to.

Apparently Emacs does receive native characters if Option keys aren't set up as Meta, however I don't have an abundance of modifier keys on my keyboard so I'd prefer to keep Option as Meta and use quoted-insert when needed.

Answer 1

As I learned that Emacs enters native special symbols if Option isn't mapped to Meta, I went ahead and made a wrapper for quoted-insert that does the unmapping:

(defun my/quoted-insert-wrapper (arg)
  "For quoted-insert, unmap Option from Meta so special symbols can be entered with the native Mac layout"
  (interactive "*p")
  (let ((mac-option-modifier 'none))
    (quoted-insert arg)))

;;; this should work for non-Evil setups, but haven't tested it
;; (global-set-key (kbd "C-v") #'my/quoted-insert-wrapper)

(define-key evil-insert-state-map (kbd "C-v") #'my/quoted-insert-wrapper)

Works like a charm so far, even for diacritic modifiers. Users of non-Latin layouts will probably also want to add a mapping for keys in their language on the same location as Latin C-v.

However, I'm not sure whether hijacking the option with let would work if lexical binding is enabled—but that's a different issue. Presumably I still could setq the option and then revert it after quoted-insert.