Tangentially related, a relative bought a new Apple laptop a few weeks ago, and I was tasked with setting it up. The computer came pre-equipped with a Czech keyboard (apparently the US models weren't in stock and that relative needed a new computer as soon as possible, so they bought a Czech one).

Since the user doesn't speak Czech, I promptly removed the Czech layout and installed two other layouts, US English and Hebrew, for the languages that the relative uses to type on the computer.

For some reason, login screen just after boot still uses Czech layout, which means Z and Y are swapped and numbers must be typed with Shift (just pressing numbers outputs Czech letters like ěščř). So when booting up the machine (remember that you can't use fingerprint during first unlock), the user must type the password in whatever layout is physically printed on the keys, even though the rest of the OS doesn't even have a mention of that layout. Somehow afterwards the OS "can" see the list of the layouts and lock screen correctly chooses the English US layout.

Alongside of that, for some reason, the key that's supposed to type ` and ~ in the US layout types some nonsense instead (a plus-minus sign and a section sign), whereas the backtick key is for some reason located between left Shift and Z (good luck unlearning years of muscle memory typing ~/Documents in the terminal)