Switching to english input source with one key

In gnome it’s possible to configure a switch to English input layout with one key (CapsLock as example). How can I configure something similar on Manjaro?

I have 3 input sources configured on my laptop and switching layout is confusing (I often switch to wrong layout, have to type/delete and switch again).

If there would be an ability to switch to english with a click of one key, it would be such a huge relief and productivity boost for me.

Any tips how to achive that with Manjaro?

I’m afraid your question makes no sense. GNOME is a desktop environment. Manjaro is a GNU/Linux distribution, with GNOME as one of the available desktop environments.

This is in german, but aunt google is your friend, I presume:

https://help.ubuntu.com/stable/ubuntu-help/keyboard-layouts.html.de