Fixed #29713 -- Added check that LANGUAGE_CODE uses standard language id format.

1 files changed, 13 insertions, 0 deletions

diff --git a/docs/ref/checks.txt b/docs/ref/checks.txt
index 42296f65c9..734381e2b8 100644
--- a/docs/ref/checks.txt
+++ b/docs/ref/checks.txt
@@ -86,6 +86,7 @@ Django's system checks are organized using the following tags:
 * ``staticfiles``: Checks :mod:`django.contrib.staticfiles` configuration.
 * ``templates``: Checks template related configuration.
 * ``urls``: Checks URL configuration.
+* ``translation``: Checks language formats used for translation.
 
 Some checks may be registered with multiple tags.
 
@@ -449,6 +450,18 @@ The following checks are performed on your URL configuration:
 * **urls.E006**: The :setting:`MEDIA_URL`/ :setting:`STATIC_URL` setting must
   end with a slash.
 
+Translation
+-----------
+
+The following checks are performed on your translation configuration:
+
+* **translation.E001**: LANGUAGE_CODE in settings.py is ``<language_code>``.
+   It should be in the form ll or ll-cc where ll is the language and cc is the
+   country. Examples include: ``it``, ``de-at``, ``es``, ``pt-br``. The full
+   set of language codes specifications is outlined by
+   https://en.wikipedia.org/wiki/IETF_language_tag#Syntax_of_language_tags
+
+
 ``contrib`` app checks
 ======================