Pseudo-localization lets you easily see which strings in your site are not yet marked for translation.  That's pretty useful if you don't yet have a real translation, but want to check whether someone could do a translation if you paid them to do so.  Didn't find a good package freely available (though I imagine there must be lots of them), so just wrote a quicky one with polib that does basic "reverse the text" style pseudo-localization.  Could add spacing out text (to simulate normal expansion with more verbose languages), substituting accented character and other nice features, but for the moment I don't need them.  Anyway, the project is up if others would like to hack on it (bzr branch lp:fakelion).