This app is built using core features of django-modeltranslation: https://github.com/deschler/django-modeltranslation

It's an alternative approach for i18n support on Wagtail CMS websites.

The wagtail-modeltranslation application is used to translate dynamic content of existing Wagtail models to an arbitrary number of languages, without having to change the original model classes. It uses a registration approach (comparable to Django's admin app) to add translations to existing or new projects and is fully integrated into the Wagtail admin UI.

The advantage of a registration approach is the ability to add translations to models on a per-app basis. You can use the same app in different projects, whether or not they use translations, and without touching the original model class.

• Add translations without changing existing models or views
• Translation fields are stored in the same table (no expensive joins)
• Supports inherited models (abstract and multi-table inheritance)
• Handle more than just text fields
• Wagtail admin integration
• Flexible fallbacks, auto-population and more!
• Default Page model fields has translatable fields by default
• StreamFields are now supported!

wagtail-modeltranslation patches Wagtail's Page model with translation fields title_xx, slug_xx, seo_title_xx, search_description_xx and url_path_xx where "xx" represents the language code for each translated language. This is done without migrations through command sync_page_translation_fields. Since Page model belongs to Wagtail it's within the realm of possibility that one day Wagtail may add a conflicting field to Page thus interfering with wagtail-modeltranslation.

Wagtail's slugurl tag does not work across languages. wagtail-modeltranslation provides a drop-in replacement named slugurl_trans which by default takes the slug parameter in the default language.

1. Install wagtail-modeltranslation:

   pip install wagtail-modeltranslation

2. Add 'wagtail_modeltranslation' to your INSTALLED_APPS setting like this (before all apps that you want to translate):

   INSTALLED_APPS = (
       ...
       'wagtail_modeltranslation',
       'wagtail_modeltranslation.makemigrations',
       'wagtail_modeltranslation.migrate',
   )

3. Add 'django.middleware.locale.LocaleMiddleware' to MIDDLEWARE on your settings.py:

   MIDDLEWARE = (
       ...
       'django.middleware.locale.LocaleMiddleware',  # should be after SessionMiddleware and before CommonMiddleware
   )

4. Enable i18n on settings.py:

   USE_I18N = True

5. Define available languages on settings.py:

   from django.utils.translation import gettext_lazy as _
   
   LANGUAGES = (
       ('pt', _('Portuguese')),
       ('es', _('Spanish')),
       ('fr', _('French')),
   )

6. Create translation.py inside the root folder of the app where the model you want to translate exists:

   from .models import Foo
   from modeltranslation.translator import TranslationOptions
   from modeltranslation.decorators import register
   
   @register(Foo)
   class FooTR(TranslationOptions):
       fields = (
           'body',
       )

7. Run python manage.py makemigrations followed by python manage.py migrate (repeat every time you add a new language or register a new model)
8. Run python manage.py sync_page_translation_fields (repeat every time you add a new language)
9. If you're adding wagtail-modeltranslation to an existing site run python manage.py update_translation_fields

• Template tag change_lang now needs a second parameter, page

This version includes breaking changes as some key parts of the app have been re-written:

• The most important change is that Page is now patched with translation fields.
• WAGTAILMODELTRANSLATION_ORIGINAL_SLUG_LANGUAGE setting has been deprecated.

To upgrade to this version you need to:

• Replace the WagtailTranslationOptions with TranslationOptions in all translation.py files
• Run python manage.py sync_page_translation_fields at least once to create Page's translation fields
• Replace any usages of Wagtail's {% slugurl ... %} for wagtail-modeltranslation's own {% slugurl_trans ... %}
• While optional it's recommended to add 'wagtail_modeltranslation.makemigrations' to your INSTALLED_APPS. This will override Django's makemigrations command to avoid creating spurious Page migrations.

This version has some important changes as there was a refactoring to include django-modeltranslation as a dependency instead of duplicating their code in our version. This allow us to focus on Wagtail admin integration features as django-modeltranslation is very well mantained and is very quickly to fix problems with the latest Django versions. This way we also keep all the django-modeltranslation features (if you want you can also customize django-admin, for example). We also provide a new class to create the translation options classes: WagtailTranslationOptions Most of the changes are related to imports as they change from wagtail-modeltranslation to modeltranslation.

To upgrade to this version you need to:

• Replace the TranslationOptions with WagtailTranslationOptions in all translation.py files
• The import of the register decorator is now from modeltranslation.decorators import register
• The import of translator is now from modeltranslation.translator import translator

https://github.com/infoportugal/wagtail-modeltranslation

http://wagtail-modeltranslation.readthedocs.io/