Unless migrated by the ProVision tool, the default language is English. Even though the language can be controlled by an administrator, options built into the firmware of the stations that support multiple language displays allow the user to change the language on the station.
The system administrator can change the language used on the station in either System Manager or Communication Manager.
Some Avaya Aura® languages are not supported by Device Adapter. These are Spanish (Latin America) and French (Canada). If one of these languages is configured for the user in System Manager, Device Adapter maps it to the supported Spanish or French language respectively.