def _get_populate_values(self, instance) -> Tuple[str, str]:
        """Gets all values (for each language) from the
        specified's instance's `populate_from` field.

        Arguments:
            instance:
                The instance to get the values from.

        Returns:
            A list of (lang_code, value) tuples.
        """

        return [
            (
                lang_code,
                self._get_populate_from_value(
                    instance,
                    self.populate_from,
                    lang_code
                ),
            )
            for lang_code, _ in settings.LANGUAGES
        ]