Language translation inside django admin and calendar headers (prev, today, next, year and month) are not working

[ghost]

Hi, for some reason language translation inside django admin and calendar headers (prev, today, next, year and month) are not working, i know that there is an spanish translation file and my settings are the following:

---

TIME_ZONE = 'America/Argentina/Cordoba'
LANGUAGE_CODE = 'es'
SITE_ID = 1
USE_I18N = True
USE_L10N = True

USE_TZ = True

Any ideas ??? thanks a lot !!!!