OK, let's just not have translation placeholders until a sensible method of transferring translations (and, more importantly in this case, their contexts) from a dataengine to an applet is devised.

See the thread beginning with <a href="http://mail.kde.org/pipermail/panel-devel/2008-April/009575.html">http://mail.kde.org/pipermail/panel-devel/2008-April/009575.html</a>;

Applets will just have to have their own translation strings...