e of {'bert', 'distilbert'}
                            tokenization and preprocessing for use with
                            BERT/DistilBert text classification model.
    lang (str):            language.  Auto-detected if None.
    is_regression(bool):  If True, integer targets will be treated as numerical targets instead of class IDs
    random_state(int):      If integer is supplied, train/test split is reproducible.
                            If None, train/test split will be random
    verbose (boo