INSTALATION:

Add to TEMPLATE_CONTEXT_PROCESSORS:
  "schoolcalendar.contextprocessor.global_calendar_ctx"
  "schoolcalendar.contextprocessor.get_language",


Add to INSTALLED_APPS 
  'schoolcalendar' 
  'template_utils'
 
template_utils is 3rd party package search for it .

In templates :

{% extends "base.html" %}

{% load lang_manager%}

    {% block css_block %}
    <link href="/static/css_en/calendar_small.css" rel="stylesheet" type="text/css" />
    <link href="/static/facebox/facebox.css" media="screen" rel="stylesheet" type="text/css"/>
    {% endblock %}

    {% block js_block %}
    <script type="text/javascript" src="/static/Script__en/jquery-1.3.min.js"></script>
    <script src="/static/facebox/facebox.js" type="text/javascript"></script>
    {% endblock %}

{% block content %}
    <div class="sidebar_links" id="sidebar_calendars_link"><a href="/{{language}}/calendar/" class="sidebar_links">Detailed EventCalendar</a>

        <div class="small_calendar" id="small_calendar">
            {% include "calendar/calendar_small_en.html"%}
         </div>
     </div>


{% endblock %}