      for package in packages:
          p = importlib.import_module(package)
          path = os.path.join(os.path.dirname(upath(p.__file__)), 'locale')
          paths.append(path)
      # add the filesystem paths listed in the LOCALE_PATHS setting
      paths.extend(reversed(settings.LOCALE_PATHS))
      # first load all english languages files for defaults
      for path in paths:
          try:
              catalog = gettext_module.translation(domain, path, ['en'])
              t.update(catalog._catalog)
          except IOError:
              pass
          else:
              # 'en' is the selected language and at least one of the packages
              # listed in `packages` has an 'en' catalog
              if en_selected:
                  en_catalog_missing = False
      # next load the settings.LANGUAGE_CODE translations if it isn't english
      if default_locale != 'en':
          for path in paths:
              try:
                  catalog = gettext_module.translation(domain, path, [default_locale])
              except IOError:
                  catalog = None
              if catalog is not None:
                  t.update(catalog._catalog)
      # last load the currently selected language, if it isn't identical to the default.
      if locale != default_locale:
          # If the currently selected language is English but it doesn't have a
          # translation catalog (presumably due to being the language translated
          # from) then a wrong language catalog might have been loaded in the
          # previous step. It needs to be discarded.
          if en_selected and en_catalog_missing:
              t = {}
          else:
              locale_t = {}
              for path in paths:
                  try:
                      catalog = gettext_module.translation(domain, path, [locale])
                  except IOError:
                      catalog = None
                  if catalog is not None:
                      locale_t.update(catalog._catalog)
              if locale_t:
                  t = locale_t
      plural = None
      if '' in t:
          for l in t[''].split('\n'):
              if l.startswith('Plural-Forms:'):
                  plural = l.split(':', 1)[1].strip()
 
</s> remove     if '' in t:
        for l in t[''].split('\n'):
            if l.startswith('Plural-Forms:'):
                plural = l.split(':', 1)[1].strip()
 </s> add     if '' in trans_cat:
        for line in trans_cat[''].split('\n'):
            if line.startswith('Plural-Forms:'):
                plural = line.split(':', 1)[1].strip() </s> remove     en_selected = locale.startswith('en')
    en_catalog_missing = True
 </s> add  </s> remove         self._init_translation_catalog()
        self._add_installed_apps_translations()
 </s> add         if self.domain == 'django':
            if localedirs is not None:
                # A module-level cache is used for caching 'django' translations
                warnings.warn("localedirs is ignored when domain is 'django'.", RuntimeWarning)
                localedirs = None
            self._init_translation_catalog()

        if localedirs:
            for localedir in localedirs:
                translation = self._new_gnu_trans(localedir)
                self.merge(translation)
        else:
            self._add_installed_apps_translations()
 </s> remove     t = {}
 </s> add 
    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

      for package in packages:
          p = importlib.import_module(package)
          path = os.path.join(os.path.dirname(upath(p.__file__)), 'locale')
          paths.append(path)
    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

    trans = DjangoTranslation(locale, domain=domain, localedirs=paths)
    trans_cat = trans._catalog

      plural = None
      if '' in t:
          for l in t[''].split('\n'):
              if l.startswith('Plural-Forms:'):
                  plural = l.split(':', 1)[1].strip()
keep keep keep keep replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace replace keep keep keep keep keep
 Reused the DjangoTranslation class for the javascript_catalog view

Thanks Tim Graham and Cristiano Coelho for the reviews.
Refs #26328, #26319. 
django/views/i18n.py