Add second keyboard layout with localectl

I am using Fedora 28 workstation with Gnome. My current layout status with localectl status is System Locale: LANG=en_US.UTF-8 VC Keymap: us X11 Layout: us I am using localectl set-x11-keymap "us,gr" "" "," in order to add second (greek) layout. New localectl status result is System Locale: LANG=en_US.UTF-8 VC Keymap: us X11 Layout: us,gr X11 Variant: , but when I press super(key) + space, no greek characters are displayed. How can I add a second keyboard layout with command line? I have a fresh install of Fedora 28 Workstation. Selected language and keyboard layout are "US". I am trying to add a second language in the keyboard but not from Gnome (i.e. Settings->Region & Language-> Input Source), but from the command line. I am using localectl; when I use set-keymap, I can write greek characters on the login screen but not in a terminal. I am trying set-x11-keymap and I can't write greek characters -- only US. When I enter the simple command localectl set-x11-keymap us,gr in the login screen the language selector is present. But AFTER I log in, there is no language selector in the taskbar!?!?! I then made a clean install. Step 1: before I make anything, I execute setxkbmap -print and I get xkb_keymap { xkb_keycodes { include "evdev+aliases(qwerty)" }; xkb_types { include "complete" }; xkb_compat { include "complete" }; xkb_symbols { include "pc+us+inet(evdev)" }; xkb_geometry { include "pc(pc105)" }; }; Step 2: I execute the following command setxkbmap -layout "us,gr" -option "grp:win_space_toggle" Step 3: now I am trying to press win+space keys but I can't print greek characters. Step 4: the output of setxkbmap -print is now xkb_keymap { xkb_keycodes { include "evdev+aliases(qwerty)" }; xkb_types { include "complete" }; xkb_compat { include "complete" }; xkb_symbols { include "pc+us+gr:2+inet(evdev)+group(win_space_toggle)"}; xkb_geometry { include "pc(pc105)" }; }; I logged out and there is no language selector on login screen. Also: after I log in, I can write only English characters.