I made a small little 'yad' app that allows changing the existing keymap to whatever is chosen.....no sudo password required. 
It's available in 'gitlab here':
But also can be downloaded as a simple clickable script here:
https://triantares.ddns.net/Elive/uploads/elive-quick-keymap-changer.sh
Just a matter of downloading and doing a double-click to make it run.
What's the handiest thing is to have a widget that from a single (or double) click we can select one or other keymap
It's not included by default but I think we had a howto explaining how to set up it, don't remember which app was 
, maybe Elive needs a better support for more than one keyboard, but if im not wrong that's already included in E25+
In any case, good alternative app to have 
Which is exactly what this app does but ..... there's a lot of keymaps to choose from, if you want all of them as an option.
In time we can add options to set fixed chosen keymaps using either a 'HotKey' combo like 'Alt + Shift' as well as a clickable icon in i.e the 'systray.'....I suspect that's what youre referring to
Something like 'gxkb', which has been mentioned before:
Maybe we just pull in that app and add a GUI configurator for the wanted keymap- and toggle-choices. 
Not really meant as an alternative but as a replacement for 'elive-reconfigure-language-keyboard' which clearly is written as a script for the 'installer' or on the first run of the 'live'-version....and does that job just fine but is overkill in a running system.
The really 'good' thing is that