Adding variants of the same language to Django? - django

Question

I am working on localization of a Django app, and the requirement dictated us to have 2 type of Traditional Chinese-- Taiwan and Hong Kong.
However, looking at the Django code,
...
...
("vi", gettext_noop("Vietnamese")),
("zh-hans", gettext_noop("Simplified Chinese")),
("zh-hant", gettext_noop("Traditional Chinese")),
]
It seems to only support one Traditional Chinese language.
I tried putting the language zh-hant-hk in setings.py. But instead of falling back to the Traditional Chinese or English, I got an error instead.
$ python manage.py runserver
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
File "/usr/local/Cellar/python#3.9/3.9.10/Frameworks/Python.framework/Versions/3.9/lib/python3.9/threading.py", line 973, in _bootstrap_inner
self.run()
File "/usr/local/Cellar/python#3.9/3.9.10/Frameworks/Python.framework/Versions/3.9/lib/python3.9/threading.py", line 910, in run
self._target(*self._args, **self._kwargs)
File "/usr/local/lib/python3.9/site-packages/django/utils/autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/django/core/management/commands/runserver.py", line 125, in inner_run
autoreload.raise_last_exception()
File "/usr/local/lib/python3.9/site-packages/django/utils/autoreload.py", line 87, in raise_last_exception
raise _exception[1]
File "/usr/local/lib/python3.9/site-packages/django/core/management/__init__.py", line 398, in execute
autoreload.check_errors(django.setup)()
File "/usr/local/lib/python3.9/site-packages/django/utils/autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/usr/local/lib/python3.9/site-packages/django/apps/registry.py", line 116, in populate
app_config.import_models()
File "/usr/local/lib/python3.9/site-packages/django/apps/config.py", line 304, in import_models
self.models_module = import_module(models_module_name)
File "/usr/local/Cellar/python#3.9/3.9.10/Frameworks/Python.framework/Versions/3.9/lib/python3.9/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 850, in exec_module
File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
File "/usr/local/lib/python3.9/site-packages/django/contrib/auth/models.py", line 97, in <module>
class Group(models.Model):
File "/usr/local/lib/python3.9/site-packages/django/db/models/base.py", line 192, in __new__
new_class.add_to_class(obj_name, obj)
File "/usr/local/lib/python3.9/site-packages/django/db/models/base.py", line 369, in add_to_class
value.contribute_to_class(cls, name)
File "/usr/local/lib/python3.9/site-packages/django/db/models/fields/related.py", line 1882, in contribute_to_class
self.remote_field.through = create_many_to_many_intermediary_model(
File "/usr/local/lib/python3.9/site-packages/django/db/models/fields/related.py", line 1261, in create_many_to_many_intermediary_model
"verbose_name": _("%(from)s-%(to)s relationship")
File "/usr/local/lib/python3.9/site-packages/django/utils/functional.py", line 183, in __mod__
return str(self) % rhs
File "/usr/local/lib/python3.9/site-packages/django/utils/functional.py", line 147, in __text_cast
return func(*self.__args, **self.__kw)
File "/usr/local/lib/python3.9/site-packages/django/utils/translation/__init__.py", line 95, in gettext
return _trans.gettext(message)
File "/usr/local/lib/python3.9/site-packages/django/utils/translation/trans_real.py", line 374, in gettext
_default = _default or translation(settings.LANGUAGE_CODE)
File "/usr/local/lib/python3.9/site-packages/django/utils/translation/trans_real.py", line 287, in translation
_translations[language] = DjangoTranslation(language)
File "/usr/local/lib/python3.9/site-packages/django/utils/translation/trans_real.py", line 173, in __init__
raise OSError(
OSError: No translation files found for default language zh-Hant-hk.
Had been looking at the documentation but didn't seem to be mentioned anywhere...