The standard EeePC701 only offers us English (US), or two flavours of Chinese; but it is reasonably easy to install and activate other languages if you are so inclined.
Here is how I installed the interface in French for a user who speaks neither English nor Chinese. All the following was done using the Advanced desktop.
First of all, you must add repositories as described in the relevant page, not forgetting to do the pinning.
Then launch synaptic as root (in a Konsole, either “su” then “synaptic”, or “sudo synaptic” depending on your personal taste, and whether you have installed a root password), for security reload the package information, and do a search on ”-fr” to locate (mainly) the French localisation packages, then select for installation all the packages that seem relevant, like “kde-i18n-fr” and “xandros-i18n-fr”, and also the similar locale files for Open Office, Mozilla, maybe the man-pages and system help files; the Apply and wait for the download and installation of the selected packages.
After this, you must edit (as root) the file /etc/default/locale and replace “LANG=en_US.UTF8” with “LANG=fr_FR.UTF8”.
Finally, sad to say, you must reboot for the language change to be taken in consideration by the system.