Last night I installed two times like this using openSUSE 13.2 DVD iso:
Selecting:
Language: English
Keyboard: German
Location: Germany
DE: XFCE

When the installation was finished, XFCE and many programs (except yast, maybe
there are not translations?) where in german, instead of english.

# echo $LANG
de_DE.utf8

RC_LANG in /etc/sysconfig:
en_US.UTF-8

Kind of confusing, hope someone can shed some light on this.

Not sure whether it is a problem of yast, XFCE or me :-)