left alt + right alt kb layout switching doesn't seem to work

[pergatore]

Hello, I've tried adding a few keyboards for languages I'm learning / using and the config file says to use left alt + right alt to switch layouts, however that doesn't seem to register at all, and I can't find the binding configured anywhere in Omarchy/hyprland either, does anyone know how to configure it?

[pergatore]

For those wanting a workaround I installed fcitx5-mozc fcitx5-configtool fcitx5-gtk and configured the languages I wanted via fcitx5-configtool and swapping layouts with ctrl + space, it also requires you to add this line:
exec-once = fcitx5 to your hyprland.conf
and these two to your .bashrc:

export QT_IM_MODULE=fcitx
export XMODIFIERS=@im=fcitx

note fcitx5-mozc is only required if you want Japanese input

[alpiua]

Thank you for a clue.
I face another issue, in fresh install fcitx5 GUI was not working at all.

fcitx5-configtool 
You're currently running Fcitx5 with GUI, but fcitx5-config-qt couldn't be found. The package name of the configuration tool is usually fcitx5-configtool. Now it will open the configuration directory.
[0.102] Ignoring unknown config key: window_padding_height
[0.102] Ignoring unknown config key: show_window_resize_notification
[0.102] Ignoring unknown config key: single_instance
ignoreboth or ignorespace present in bash HISTCONTROL setting, showing running command will not be robust

It seems that these packages fcitx5-configtool and fcitx5-gtk supposed to be present in a system. After installing them I was able to add a language via GUI and use a chosen hotkey, with layout indicator working.
I would consider absence of these packages as a bug.

[pergatore]

I don't know if those packages are needed, the creator of hyprland himself did hint at my solution though. But it seems Omarchy has implemented or tried to implement some sort of language support, though I'm uncertain where and how exactly.

[sndsh404]

This is not a Hyprland keybinding, so searching the keybinding files will not find it. grp:alts_toggle is an XKB option. It goes in kb_options.

Omarchy has that block commented out by default. So the comment describes something that is not turned on yet.

On Omarchy 4.0.0 the file is ~/.config/hypr/input.lua, and it uses Lua now instead of the old conf format. Add this at the end of the file:

hl.config({
  input = {
    kb_layout = "us,de",
    kb_options = "grp:alts_toggle",
  },
})

It works as soon as you save. No restart needed. Tested on 4.0.0 with Hyprland 0.56.2: both Alts switches, y becomes z on German. To check it worked, run hyprctl getoption input:kb_options.

On Omarchy 3 the same settings are in input.conf with the older syntax, but the reason is the same. It is commented out by default.

You do not need fcitx5 for this. fcitx5 is for input methods like Mozc for Japanese. For switching between two normal keyboard layouts, the XKB option is enough.