Your MacBook Air can be configured with the keyboard language options listed. The User’s Guide language will match that of the keyboard language chosen unless otherwise specified. OS X Mavericks is a multilingual operating system. During the setup process you can choose one of the many languages it supports for application menus and dialogs and to read and write text. OS X Mavericks also allows you to select your preferred language at any time using System Preferences.
Note: Your computer comes equipped with cables appropriate for the country in which you purchased it.