LM13xfce & a diy pc.
Here is how I was able to create a dual language (EN & DK) keyboard.
I change languages by pressing ctrl and shift together
with my left pinky finger. EZ PZ.
No desktop language indicator.
Go to etc/default/keyboard
XKBLAYOUT="us,dk" <<== edit for your languages
XKBOPTIONS="grp:ctrl_shift_toggle" <<== edit for your toggle key(s)
If this solves your issue, please edit your question as [SOLVED]
Wirth's law - Software is getting slower more rapidly than hardware becomes faster.