Paolo Cutini reported one bug when sending in his latest translation file (which I included in t new installer build and posted); and I found another when checking his. They're both cosmetic:

• The Hint properties of TSpinEdit controls are not written back to the control when they've been translated, and the translation file is loaded. This is probably related to the fact that they're strings, not WideStrings; the hard solution would be to create a TTntSpinEdit which uses WideStrings, and the soft solution would be to disable hints on those controls, and make sure that their associated labels have good hints.
• If you load a translation file, then restart the app, then go back to the Preferences screen and clear the translation file, the original English is not restored. That's because the BackupAppRef in which the original English texts are stored is not created unless you go to the Preferences screen and load another translation; we need to create one when the app starts up, before another interface is loaded, and use that when reverting to "no translation file".

These are documented on the app's bugs page, and this is set as a task for November (the next scheduled release).