Dealt with this here.
Got the following bug report from Paolo:
There's a strange bug that seems to affect both IMT and Transformer; I remember I reported it some time ago, though it's still persisting not only in the Italian but also in all the other translation files of IMT.
The following tooltips in the "Preferences" window, cannot be translated in Transformer nor are they correctly displayed in IMT, even if they appear as translated in the relevant italian.gui.xml file:
1) "Font size in points" (x 2)
2) "Number of seconds tooltip hints will be shown before..."
What is strange is that those items don't show up either in the translation screen after loading the English gui file or in the English gui file itself. The question is, where does the program take these items from?