Datetime field display is not translated to other language

My project i18n setup worked fine with different languages, except not able to show date time value in language and format that configured with browser preference. I do have USE_L10N = True, but it always show date time in my default language and format LANGUAGE_CODE = ‘en-us’. I’m not specifying anything on .po file for date and time, expected everything default for the locale.
On my model, I have field

    created = models.DateTimeField(auto_now_add=True)

On my template file, I have

{% load i18n %}
{% load l10n %}
    {% if field_name == 'created' %}
         <td>{{ object.created|localize }}</td>

What did I miss that made it not showing the datetime in browser preferred language?