#dpkg-reconfigure tzdata
or:
$ sudo dpkg-reconfigure tzdata
-): Language: In case of a second language, we have to configure the system, and this is how we can do it. It is not the only way, but the way i use.
$ sudo leafpad /etc/xdg/lxsession/LXDE/autostart
and there i put the line below, to change between two or more languages, plus the application(s) i want to start the same time:
@setxkbmap -option grp:switch,grp:alt_shift_toggle,grp_led:scroll fr,gr
-): logout & login.