I use English (US) for most of my typing, but also switch to Spanish (Windows) and Portuguese (Brasil). Whenever I am on Spanish or Portuguese, switching to another window causes Cinnamon to hang, and I have to switch to another TTY to restart it.
System:
Kernel: 6.8.0-107-generic arch: x86_64 bits: 64 compiler: gcc v: 13.3.0 clocksource: tsc
Desktop: Cinnamon v: 6.6.7 tk: GTK v: 3.24.41 wm: Muffin v: 6.6.3 vt: 7 dm: LightDM v: 1.30.0
Distro: Linux Mint 22.3 Zena base: Ubuntu 24.04 noble
Additionally, I have Fcitx with Chinese, Korean and Japanese input methods installed, but those don't appear to affect the behavior.
This issue has persisted for a few versions of Mint. I can provide more info if needed.