YaST and SUSE LINUX in general can be configured to use different languages according to your needs. The language selected here is also used for the keyboard layout. In addition, YaST uses the language setting to guess a time zone for the system clock. These settings can be modified later along with the selection of secondary languages to install on your system. If your mouse does not work, select the language with the arrow keys and press Tab until is highlighted. Then press Enter to confirm your language selection.