This would work how with touch typing?
The issue is how the industrial design is parametrised. Within one parametrisation there may be many, many implementations.
If you parametrise for a static input method, you are at sea since the coded character set is for the writing systems of world scripts (which has not dawned on the US and the UK -:)).
If you parametrise for a dynamic input method, then you have a viable parametrisation, but you also need a viable implementation in order to sell your product.
I would not say that Dell has a viable implementation even of monolingual input on its tablet, since the input method takes space on the output area.
I would not say that Nokia has a viable implementation even of monolingual input on its hard key phones - I HATE, HATE, HATE these contraptions.
I have to cycle through key presses to get from what the UK and the US gets as the Basic Latin to what I need for Danish, or Swedish, or German. This is IDIOTIC.
I saw UK and US pundits in the IT press poking fun at the trend in industrial design for phones towards input methods in touch surfaces.
I am not sure what they use for brains, but I am sure they are of the opinion that interactivity for input methods and character identification should be English and only English.
Ye gads, if a panel of industrial designers were called to evaluate interactivity for what is sold into the IT markets in the EU, they would have a collective heart attack.
/hh