How to set html lang attribute in Django template?-CodePudding

I wrote a Django application that serves translated content for German users, and English content for everyone else. Currently I use a base template containing:

<!DOCTYPE html>
<html lang="en">

Obviously this sets the wrong lang in case the content is served as German.

Possibly I could try something like

<html lang="{{ 'de' if request.LANGUAGE_CODE == 'de' else 'en' }}">

but this feels clumsy and hard to maintain in case more languages are added.

What would be a simple way to set <html lang> to the actual language served?

CodePudding user response：

You can try this

<html lang="{{ request.LANGUAGE_CODE|default:'en' %}">

this will add request.LANGUAGE_CODE if it available or it will set default value as en

CodePudding user response：

I figured it out.

The get_current_language tag contains the preferred language of the user.

{% load i18n %}
{% get_current_language as LANGUAGE_CODE %}
<html lang="{{ LANGUAGE_CODE }}">

To me the documentation did not make it clear immediately that "preferred language" is not the topmost language from the "Accept-Language" HTTP header but always the language from setting.LANGUAGES that best matches the user's preference.

In my case settings.py contains:

LANGUAGE_CODE = "en-us"
LANGUAGES = [("de", _("German")), ("en", _("English"))]

If the user however prefers Italien, get_current_language will still be en. With the Django application running locally on port 8000, you can try this with for example:

curl -H 'Accept-Language: it' http://127.0.0.1:8000/ | cut -b 1-50

The output is something like:

<!doctypehtml><html lang="en">...

If no preferred language is provided with the request, the result is the same. So there is no need for a |default:'en'. You can test this with:

curl http://127.0.0.1:8000/ | cut -b 1-50