实际上，它不是一个简单的<a>链接，而是一个<form>链接。
阅读如何set_language重定向视图。此表单将负责更改语言。非常简单。
请确保您已先设置了一些LANGUAGES。

您可以在用户单击链接时更改网站的语言（无网址翻译，无帖子），如下所示：

• navigation.html（带有引导程序4和字体）*

<li class="nav-item dropdown">
  {% get_current_language as LANGUAGE_CODE %}
  <a class="nav-link dropdown-toggle" href="#" data-toggle="dropdown">{{ LANGUAGE_CODE }}</a>
  <div class="dropdown-menu dropdown-menu-right">

    {% get_available_languages as languages %}
    {% for lang_code, lang_name in languages %}

    <a href="{% url 'main:activate_language' lang_code %}" class="dropdown-item">
      {% if lang_code == LANGUAGE_CODE %}
        <i class="fas fa-check-circle"></i>&nbsp;&nbsp;
      {% else %}
        <i class="far fa-circle"></i>&nbsp;&nbsp;
      {% endif %}
      {{ lang_name }} ({{ lang_code }})
    </a>

    {% endfor %}
  </div>
</li>

• 查看次数.py*

from django.shortcuts import redirect
from django.utils import translation
from django.views.generic.base import View

class ActivateLanguageView(View):
    language_code = ''
    redirect_to   = ''

    def get(self, request, *args, **kwargs):
        self.redirect_to   = request.META.get('HTTP_REFERER')
        self.language_code = kwargs.get('language_code')
        translation.activate(self.language_code)
        request.session[translation.LANGUAGE_SESSION_KEY] = self.language_code
        return redirect(self.redirect_to)

• 网址.py*

from django.urls import path
from .views import ActivateLanguageView

app_name = 'main'
urlpatterns = [
    path('language/activate/<language_code>/', ActivateLanguageView.as_view(), name='activate_language'),
]

这是我的工作。

新的代码片段兼容新的API（Boostrap 5和Django〉= 4.0），更新自优秀的@Boris urkan答案。
Django已经放弃了对translation.LANGUAGE_SESSION_KEY的支持，所以基本上我们需要使用session cookie来进行设置。

class ActivateLanguageView(View):

    def get(self, request, lang, **kwargs):
        url = request.META.get('HTTP_REFERER', '/')
        translation.activate(lang)
        response = HttpResponseRedirect(url)
        response.set_cookie(settings.LANGUAGE_COOKIE_NAME, lang)
        return response

Boostrap已更改其下拉列表的jQuery绑定：

<li class="nav-item dropdown">
  {% get_current_language as LANGUAGE_CODE %}
  <a class="nav-link dropdown-toggle" href="#" role="button" id="dropdownMenuLink" data-bs-toggle="dropdown" aria-expanded="false">
    <strong>{{ LANGUAGE_CODE }}</strong>
  </a>
  <div class="dropdown-menu dropdown-menu-right">

    {% get_available_languages as languages %}
    {% for lang_code, lang_name in languages %}

    <a href="{% url 'activate_language' lang_code %}" class="dropdown-item">
      {% if lang_code == LANGUAGE_CODE %}
        <i class="bi bi-check-circle"></i>&nbsp;&nbsp;
      {% else %}
        <i class="bi bi-circle"></i>&nbsp;&nbsp;
      {% endif %}
      {{ lang_name }} ({{ lang_code }})
    </a>

    {% endfor %}
  </div>
</li>

代码的其他部分基本保持不变。