Source: https://www.artlebedev.com/optimus/

While living in Taiwan in 2014, it became apparent that much of the world struggles to use their native non-Latin language on current computer hardware, so I started researching alternatives to silicone keyboard overlays and handwriting recognition apps on mobile phones... There is much about this keyboard that is not good, and there are many reasons it wasn't successful, but it does at least illustrate the concept.