D-Link DNS-323 User Manual page 75

Section 3 - Configuration
Highlight an available DNS-323 and click Language.
Select the appropriate language from the drop-down
menu and click OK.
The DNS-323 will restart.
Note: Changing the language setting will NOT change the display language
of the user interface. It is only for supporting non-English character file
names.
D-Link DNS-33 User Manual