Can't find source package for string

[Robin Sonefors]

When looking at Xubuntu, I realized there is an Applications-menu. I
want to translate the "Applications"-string, but I just can't find it!
I've almost been through every Xfce-package, and now I need your help.

So. The string "Applications" at the top left corner of the standard
Xubuntu desktop, that brings out the menu. What package is it in?