There is a manual here
http://www.gspinc.com/default.asp?contentID=203#LEGACY
According to Page 63 (Menu Layout) if you go through the menu layout there is a Language section.
It is a Mutoh plotter so maybe something on their site. Have you tried resetting to factory settings? Still looking....
It is a Mutoh plotter so maybe something on their site. Have you tried resetting to factory settings? Still looking....
Another thing to try is this:
At power up hold both the Enter + Slew Down keys together - this may revert to American English