use the english patch.
or u could install the EU or US version of rappelz and connect in german or english
lil TuT:
download the EU client. install it. let it download all updates.
then u have to create a shortcut of the SFrame.exe to ya desktop.
go to Properties of the shortcut.
there is a line PATH.
it looks like :
"D:\Program Files\gPotato.eu\Rappelz\SFrame.exe"
u got an other Path maybe.
press space once then add this:
/auth_ip:119.207.77.10 /locale:windows-1252 /country

E /cash /commercial_shop /render:<NULL>
then it looks like:
"D:\Program Files\gPotato.eu\Rappelz\SFrame.exe" /auth_ip:119.207.77.10 /locale:windows-1252 /country

E /cash /commercial_shop /render:<NULL>
this ****** smiley is just DOUBLEPOINT + D (":-D" but without the " and -)
now u are able to connect to KTS with german client. all things are in german. (the most things)
for us client its the same , but the counry-code is US or EN