This is the script i use to start it, it has been automatically created when i installed hildon-desktop:

#!/bin/bash

PREFIX=/usr

THEME=${PREFIX}/share/themes/plankton
if [ -d ${PREFIX}/share/themes/mobilebasic ]; then
THEME=${PREFIX}/share/themes/mobilebasic
fi

export DISPLAY=:1

export GTK2_RC_FILES=${THEME}/gtk-2.0/gtkrc:${THEME}/gtk-2.0/gtkrc.maemo_af_desktop
export LANG=en_GB.UTF-8

export $(dbus-launch --exit-with-session)

/usr/lib/libgconf2-4/gconfd-2 &

${PREFIX}/bin/matchbox-window-manager -display ${DISPLAY} \
-theme ${THEME}/matchbox/theme.xml \
-use_titlebar no \
-use_desktop_mode plain \
-use_lowlight no \
-use_cursor yes \
-use_super_modal yes &

${PREFIX}/lib/sapwood/sapwood-server &
${PREFIX}/lib/mobile-application-service/mas &

exec ${PREFIX}/bin/hildon-desktop


Thanks, i will try to change the locale