def _addTracker(self, string, untranslated):
        if string.__class__ == InternationalizedString:
            return string
        else:
            string = InternationalizedString(string)
            string._original = untranslated
            string._internationalizer = self
            return string
Add a kind of 'tracker' on the string, in order to keep the
dataset/ETHPy150Open ProgVal/Limnoria/src/i18n.py/_PluginInternationalization._addTracker