Hi,
unfortunately i did not get my code ISO-8859-1-coded. i don't know how to do it, exactly. what i did was to try several text-editors (for example: notepad++ (Windows98 
)). I changed the encoder to ISO8859-1 (i'm actually not sure if it finaly got saved the right way), but when i uploaded it to my arduino, i got the following Error...
GRAPHEM_PHONEM_TALK_MOVE_06.pde contains unrecognized characters.
If this code was created with an older version of Processing,
you may need to use Tools -> Fix Encoding & Reload to update
the sketch to use UTF-8 encoding. If not, you may need to
delete the bad characters to get rid of this warning.
so i gave up and tried your "work-around", and it works so far. I converted my string to lowercases by myself, but i'm sure i'll find a better way for that in future, as there might be changing inputs.
THANKS !
P