After installing openSUSE or after a switch from KDE 5 to KDE 6.
run
:~> zypper locales
Code | Language | Requested
------±------------------±---------
en | Anglais | Base
fr | Français | Base
fr_FR | Français (France) | Demandé
then run
sudo zypper addlocale fr_FR
you must change “fr_FR” by the value return by “zypper locales”
If “zypper locales” returns nothing
then
you can find the term of your langage in Firefox language settings.