K2 Keychron Ubuntu 18.04

80-keychron.rules

SUBSYSTEMS=="input", ATTRS{name}=="Keychron K2", RUN+="/bin/sh -c 'echo 0 > /sys/module/hid_apple/parameters/fnmode'"

README.md

1. Add the udev rule in /etc/udev/rules.d/
2. sudo udevadm control --reload-rules && sudo udevadm trigger
3. Use it in MacOS mode (it works even in Windows mode but I don't get the accent when typing, e.g., RALT+```+e)

Pressing right alt + ` + e and getting è is normal behavior, it's called the compose key, you can lookup how to disable it.

I know it but in Windows mode it does not work under Linux, while in Mac mode it emits è as expected.

Mmmm, I use it in windows mode on Ubuntu with the next input source for the accents issues:
English( US, International AltGr Unicode), in my cases for é (alt right + e)
but exists another inputs than for your accents é; English intl, with dead keys and English alt. intl.)