In the ./nemo_text_processing/inverse_text_normalization/zh/graph_utils.py line 79, load_labels() method is called but it is not imported, So it raises error. It could be simply resolved by adding the following method in ./nemo_text_processing/inverse_text_normalization/zh/utils.py:

def load_labels(abs_path):
    """
    loads relative path file as dictionary

    Args:
        abs_path: absolute path

    Returns dictionary of mappings
    """
    with open(abs_path, encoding="utf-8") as label_tsv:
        labels = list(csv.reader(label_tsv, delimiter="\t"))
    return labels

and import it in ./nemo_text_processing/inverse_text_normalization/zh/graph_utils.py:

from nemo_text_processing.inverse_text_normalization.zh.utils import load_labels

Also there is another bug in arabic TN tagger:
In nemo_text_processing/text_normalization/ar/taggers/decimal.py line 40, quantities is not defined. So it could be resolved by adding the following line before it (in line 33):

quantities = pynini.string_file(get_abs_path("data/numbers/quantities.tsv"))