Just as you can override a Django-provided admin template by duplicating the template's name and directory structure within our own project, you can override Django-provided admin translations by duplicating a .po file's name and directory structure within our project.
Django's admin translations live in django/contrib/admin/locale/ and are organized by language in directories named [language code]/LC_MESSAGES/. These individual language directories contain two .po files, django.po and djangojs.po, and their respective compiled .mo files. You will be overriding the .po files, and compiling our own .mo files.
The first thing you have to do is enable translations in settings, and tell Django where you store our translation files.
BASE_DIR = os.path.dirname(os.path.dirname(__file__))
LANGUAGE_CODE = 'nl-NL'
USE_I18N = True
USE_L10N = True
LOCALE_PATHS = (os.path.join(BASE_DIR, "locale"),)
Hope this works!!