[Django]-Django multi-lingual site : how to?

You can use i18n_patterns instead of django-localeurl if you use Django 1.4. or later.

i18n_patterns will set active language based on URL prefix.

Django I18n will serve translated messages in python code and templates based on active language . (You will have to makemessages and compilemessages to create and compile translations).

For translations in model there are lot of libraries, majority of them use active language to serve field translation. I prefer django-modeltranslation, which allows translating of 3rd party app models without changing their code.

Hope this helps!