The bearing ball must be touching directly the table (or some big pad (cushion) put on the table) to provide easy movement. Your design provides easy movement only withing the cushion area which is drawn about the same size as the whole device for one hand. Also the balls must be able to move around in the device if you want to use only rolling friction. Your proposal does not handle this at all.

You can provide easy "friction less" movement with magnets (magnetic levitation), air cushion (you need air pump somewhere), ultrasound levitation or some omnidirectional wheels touching directly to the table.

But if you are lazy to move your hands around then you can also get a keyboard which does not require any palm movement while typing, like e.g. K80CS: https://deskthority.net/viewtopic.php?p=250605#p250605

A lot of keyboard issues end up being a mix of preference and setup, so it’s always worth testing a few different configs before deciding something is a hardware problem. Small tweaks can make a bigger difference than people expect.

this language is inherently circuitous.

It is astonishing to think about an invented written language that ignores spoken language - while attempting to transcend it.