Siemens SINUMERIK 840D sl Commissioning Manual page 942

Configuring the system
2.2 Configuring a customized operator interface
2. Choose the "Languages" tab, in order to switch the language for the Windows XP
3. On the "Advanced" tab, choose the language for programs that do not support Unicode.
Result
To make the language change effective, the PCU must be rebooted. The selectable
languages are displayed using the font set of the respective language.
See also
How to install additional languages under Windows XP (DVD) (Page 69)
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operator interface. Under "Language used in menus and dialogues," choose the new
language and confirm with OK.
Commissioning Manual, 02/2012, 6FC5397-1DP40-3BA0
PCU-Basesoftware (IM8)