Show keyboard layout using dbus and kbdd.
kbdd is a useful daemon made for lightweight window managers. It works with xkb and remembers layouts for each window.
Dependencies: kbdd (typically in package of the same name).
You can set your keyboard configuration e.g. with
exec --no-startup-id "setxkbmap -layout us,ru -option 'grp:ctrl_alt_toggle'"
in your i3 config. The blocklet must be restarted if you execute another setxkbmap command, or it may give incorrect results.
[kbdd_layout]
command=$SCRIPT_DIR/kbdd_layout
interval=persist