Problème avec kmail et les jeux de caractères

Hello
Je suis sous debian testing, sous gnome,
Dans kmail (1.9.5) pas moyen d’ajouter des langue supplémentaire donc il faut les installer mai je ne connaît pas le paquet (note le paquer kde-i18n-fr est déjà installer). voici les jeux de caractère qui sont présent :
utf-8
iso-8859-1
us-ascii
utf-8 (locale)

Si des fois ça peut apporter des informations utile voici un local de l’utilisateur en cours:
locale
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=fr_CH.UTF-8
LC_CTYPE="fr_CH.UTF-8"
LC_NUMERIC="fr_CH.UTF-8"
LC_TIME="fr_CH.UTF-8"
LC_COLLATE="fr_CH.UTF-8"
LC_MONETARY="fr_CH.UTF-8"
LC_MESSAGES="fr_CH.UTF-8"
LC_PAPER="fr_CH.UTF-8"
LC_NAME="fr_CH.UTF-8"
LC_ADDRESS="fr_CH.UTF-8"
LC_TELEPHONE="fr_CH.UTF-8"
LC_MEASUREMENT="fr_CH.UTF-8"
LC_IDENTIFICATION="fr_CH.UTF-8"
LC_ALL=

===============================================

voici mon xorg.conf

Section "Module"
Load "bitmap"
Load "dbe"
Load "ddc"
Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
Load "v4l"
Load "vbe"
EndSection

Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option “XkbRules” "xorg"
Option “XkbModel” "pc105"
Option “XkbLayout” "ch"
Option “XkbVariant” "fr"
EndSection

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option “Device” "/dev/input/mice"
Option “Protocol” "ImPS/2"
EndSection

Section "Device"
Identifier "Carte vidéo générique"
Driver "nvidia"
BusID "PCI:1:0:0"
VideoRam 768
EndSection

Section "Monitor"
Identifier "Écran générique"
Option "DPMS"
HorizSync 30-65
VertRefresh 50-75
EndSection

Section "Screen"
Identifier "Default Screen"
Device "Carte vidéo générique"
Monitor "Écran générique"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1280x1024"
EndSubSection
SubSection "Display"
Depth 4
Modes "1280x1024"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x1024"
EndSubSection
SubSection "Display"
Depth 15
Modes "1280x1024"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x1024"
EndSubSection
EndSection

Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection

Section "DRI"
Mode 0666
EndSection

Merci d’avance