A way to provison multilanguage support in web gui and phone interface would be a nice feature.
Now its only possible to choose from a smal list of language that comes along with the firmware.
See those links:
http://wiki.snom.com/FAQ/How_can_I_enable_multiple_language_support_for_snom300/320/360
http://wiki.snom.com/Category:Auto_Provisioning:Configuration_Files