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# Internationalisation
REST framework ships with translatable error messages. You can make these appear in your language enabling [Django's standard translation mechanisms][django-translation] and by translating the messages into your language.
## How to translate REST Framework errors
This guide assumes you are already familiar with how to translate a Django app. If you're not, start by reading [Django's translation docs][django-translation].
#### To translate REST framework error messages:
1. Make a new folder where you want to store the translated errors. Add this
path to your [`LOCALE_PATHS`][django-locale-paths] setting.
---
**Note:** For the rest of
this document we will assume the path you created was
`/home/www/project/conf/locale/`, and that you have updated your `settings.py` to include the setting:
```
LOCALE_PATHS = (
'/home/www/project/conf/locale/',
)
```
---
2. Now create a subfolder for the language you want to translate. The folder should be named using [locale
name][django-locale-name] notation. E.g. `de`, `pt_BR`, `es_AR`, etc.
```
mkdir /home/www/project/conf/locale/pt_BR/LC_MESSAGES
```
3. Now copy the base translations file from the REST framework source code
into your translations folder
```
cp /home/user/.virtualenvs/myproject/lib/python2.7/site-packages/rest_framework/locale/en_US/LC_MESSAGES/django.po
/home/www/project/conf/locale/pt_BR/LC_MESSAGES
```
This should create the file
`/home/www/project/conf/locale/pt_BR/LC_MESSAGES/django.po`
---
**Note:** To find out where `rest_framework` is installed, run
```
python -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())"
```
---
4. Edit `/home/www/project/conf/locale/pt_BR/LC_MESSAGES/django.po` and
translate all the error messages.
5. Run `manage.py compilemessages -l pt_BR` to make the translations
available for Django to use. You should see a message
```
processing file django.po in /home/www/project/conf/locale/pt_BR/LC_MESSAGES
```
6. Restart your server.
## How Django chooses which language to use
REST framework will use the same preferences to select which language to
display as Django does. You can find more info in the [Django docs on discovering language preferences][django-language-preference]. For reference, these are
1. First, it looks for the language prefix in the requested URL
2. Failing that, it looks for the `LANGUAGE_SESSION_KEY` key in the current user’s session.
3. Failing that, it looks for a cookie
4. Failing that, it looks at the `Accept-Language` HTTP header.
5. Failing that, it uses the global `LANGUAGE_CODE` setting.
---
**Note:** You'll need to include the `django.middleware.locale.LocaleMiddleware` to enable any of the per-request language preferences.
---
[django-translation]: https://docs.djangoproject.com/en/1.7/topics/i18n/translation
[django-language-preference]: https://docs.djangoproject.com/en/1.7/topics/i18n/translation/#how-django-discovers-language-preference
[django-locale-paths]: https://docs.djangoproject.com/en/1.7/ref/settings/#std:setting-LOCALE_PATHS
[django-locale-name]: https://docs.djangoproject.com/en/1.7/topics/i18n/#term-locale-name
|
