Following the boot menu the kernel will be loaded and booted. Once this process is complete the installer will be launched and you will be presented with the following screen:
Here you are given the option to choose your language. Currently the installer itself does not support any languages except for English but it will accept keymappings for the languages listed. Additionally after installation language settings, keymappings and font settings will be active at the systems console.
To select your language scroll through the list with the arrow keys on your keyboard and when you your language is highlighed press 'enter' to select it.
You will then be brought to a welcome screen:
Press the Ok button to continue on your way.