Since pamac was open I used it to install fbxkb, along with it’s dependency,
And added the line to the openbox autostart file.
After rebooting, I see no way to toggle over.
(Running fbxkb in a terminal I get:
(fbxkb:4203): Gtk-WARNING **: 10:56:14.535: Unable to locate theme engine in module_path: “clearlooks”,
(fbxkb:4203): Gtk-WARNING **: 10:56:14.536: Unable to locate theme engine in module_path: “clearlooks”,
xkb group #0 is already defined
The XFCE-4 panel widget shows two settings on right clicking:
Keyboard settings and
Keyboard Layouts but the latter is grayed out for some reason.
(With Manjaro Openbox this is not the case, but I consider Mabox to be a significantly more polished OS and would like to get this detail fixed).