Load data from a Excel-formatted CSV file.

async def _load(self):
        """
        Load data from a Excel-formatted CSV file.
        """

        key = self._kwargs['key']
        pos = self._kwargs['pos']
        neg = self._kwargs['neg']

        with open(self._file_path, newline='', encoding='utf-8') as f:
            reader = csv.reader(f)
            data = {}

            for row in reader:
                try:
                    data[row[key]] = data.get(row[key], []) + [
                        tuple(extract_ranges(row, [pos] + neg))
                    ]
                except IndexError:
                    pass

        self._update({self._locale: data})