Etaion shrdlu blinking aid

Jean-Do Bauby wrote 'The Diving Bell And The Butterfly' by blinking at the appropriate letter as they were recited from the most common to the rarest in the French language, because the only voluntary movement he could make after a stroke was to blink one eyelid. I have been told, and i seriously hope this is not true, that blinking in this way, or making some other voluntary movement if another muscle can be moved, is standard practice for communication in this situation. I am also sceptical about blinking being his only voluntary action because it sounds to me that he could also move his eye. If that had not been possible, he would have been blind because vision depends on eye movements.

There is a very clear solution to this problem. I have done a search and can't find a reference to anything similar, so i'm posting it here.

Suppose someone has locked-in syndrome, where they are cognitively intact but can only move one voluntary muscle. Arrange the letters of in this case English in three grids. Combine some letters, namely I and J and U and V, as they were before the eighteenth century. Establish a convention where X is replaced by KS or Z, QU by KW, C is used to spell the sound customarily spelt CH in English and replace C itself by K and S as appropriate. This frees up some space for the most common words of more than two letters. Omit the articles and "is"; they aren't needed in an emergency. Then produce the following grids:

Grid one:

E, T, R
O, A, D
C, U/V, L

Grid two:

I/J, N, M
H, S, F
P, Y, W

Grid three:

B, G, and
Z, K, you
that, for, with

Then, blink (or whatever) as follows:

First blink: which grid. Second blink: X-coordinate. Third blink: Y-coordinate.

There are no spaces and no punctuation, but the former can be produced by pauses and the latter by spelling them out when ambiguity needs to be avoided. It would be possible to communicate each of these letters or words with a maximum of nine blinks, and the speed of communication could be increased further through such techniques as the use of text speech.

Construct similar tables for each language based on frequency. For Austonesian languages, communication could be sufficiently fast to mean that the patient would be motivated to learn, for example, Samoan or Hawaiian simply to communicate faster than in an Indoeuropean language.

If the patient has more movement than just one muscle, they can use the other muscle movements to indicate more than one coordinate at a time. For instance, if they can move one eye freely, they can indicate a letter by moving their eye to the appropriate ninth of their visual field and blinking the requisite number of times.

I considered Morse code and ASCII but this would involve more learning and coordination than such people might be able to manage. This can be acquired much more swiftly, though clearly learning Samoan or Hawaiian would take longer for many people if they spoke, say, Spanish, Russian or English. The same applies to Blissymbols.

This system could be used by people who are disabled in various ways, by people who have been restrained to communicate with each other, by prisoners tapping on pipes and by S&M people who have been restrained for recreational purposes. OK, a couple of frivolous examples there, but basically i am serious about this.

Somebody please tell me this is baked or that something better is, because otherwise there are a load of people out there who are needlessly imprisoned by their disabilities.