We use a Hitachi Seiki with a Siemens/Hitachi Seiki control: seikos pc flexi.
This control is based on a Siemens 840Di control. (I believe)
After the back-up battery broke down the machine conversational part is in Japanese. The machine is working perfectly and operation of the cnc is in English. Only the conversational part is in Japanese.
I contacted Siemens and a lot of other companies, but nobody seems able to help me.
If possible, please explain me how to select English or German Language.