使用Django会话（Session）实现多语言网站的用户语言选择功能

from django.utils.translation import ugettext_lazy as _

LANGUAGE_CODE = 'zh-hans'
LANGUAGES = (
    ('zh-hans', _('Simplified Chinese')),
    ('en', _('English')),
)

from django.conf import settings
from django.http import HttpResponse
from django.utils import translation

def set_language(request):
    lang_code = request.GET.get('language')
    if lang_code and lang_code in dict(settings.LANGUAGES).keys():
        translation.activate(lang_code)
        request.session[translation.LANGUAGE_SESSION_KEY] = lang_code
    return HttpResponse('OK')

from django.urls import path
from . import views

app_name = 'myapp'
urlpatterns = [
    path('set_language/', views.set_language, name='set_language'),
]

from django import template

register = template.Library()

@register.simple_tag(takes_context=True)
def language_switch(context):
    request = context['request']
    lang_choices = context['LANGUAGES']
    current_lang = translation.get_language()
    choices = [
        (code, label, code == current_lang)
        for code, label in lang_choices
    ]
    return {
        'choices': choices,
        'next': request.path,
        'current_lang': current_lang,
    }

<div id="language-switcher">
    <form action="{% url 'myapp:set_language' %}" method="get">
        {% csrf_token %}
        <input type="hidden" name="next" value="{{ next }}">
        {% for code, label, is_current in choices %}
            <button 
                type="submit" 
                class="{% if is_current %}active{% endif %}"
                name="language" 
                value="{{ code }}"
            >
                {{ label }}
            </button>
        {% endfor %}
    </form>
</div>