ANoobis 
Ghibelline Omnipotens
An interface that cumbersome would lead to a certain economy of language.
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2 comments posted
SnakeHerder
Or you could make it pressure-sensitive. If your alphabet has few enough letters, you could distinguish between, say, four levels of pressure. Or maybe the keys have leeway like a joystick, and you actually point to the underlying letters on a table by angling the keys slightly.