I looked around the UE4 Editor documentation, and I found this:
https://docs.unrealengine.com/latest…I/KeyBindings/
I am pretty sure you can create a custom radial menu that contains custom macros to assign the keystrokes from the list of KeyBindings you have set up for UE4. You can name the macros to something more sensible. If you look at the UE4 Editor keyboard preferences (Edit->Editor Preferences->Keyboard Shortcuts) then look in the Common Viewport Commands section, you’ll see keyboard bindings for Front, Left, Top, Right, etc.
I hope that helps!