1. Apparatus comprising at least one physical computer-readable storage medium having stored thereon computer-executable instructions that, when loaded into processor hardware and executed, transform the processor hardware to perform the following: receive an indication of at least one non-linguistic action directed by at least one user to a hardware substrate; identify at least one cell within a plurality of cells defined by a software-implemented non-linguistic user interface, wherein respective ones of the cells are associated with corresponding physical regions of the hardware substrate; and calculate at least a stimulation level associated with at least the one cell, based on characteristics of the non-linguistic action.