src/transformers/models/marian/convert_marian_tatoeba_to_pytorch.py/TatoebaConverter/model_type_info_from_model_name
class TatoebaConverter:    def model_type_info_from_model_name(name):
        info = {"_has_backtranslated_data": False}
        if "1m" in name:
            info["_data_per_pair"] = str(1e6)
        if "2m" in name:
            info["_data_per_pair"] = str(2e6)
        if "4m" in name:
            info["_data_per_pair"] = str(4e6)
        if "+bt" in name:
            info["_has_backtranslated_data"] = True
        if "tuned4" in name:
            info["_tuned"] = re.search(r"tuned4[^-]+", name).group()
        return info