Add header language switcher and local json config

mandelstudio/templates/oxyan/headers/partials/carbasa-user-bar.html

@@ -1,6 +1,23 @@
 {% load i18n %}
 
 <div class="header-right">
+    {% get_current_language as current_language %}
+    {% get_available_languages as available_languages %}
+    {% get_language_info_list for available_languages as languages %}
+
+    <form action="{% url 'set_language' %}" method="post" class="ms-lang-switcher me-2" aria-label="{% trans 'Language switcher' %}">
+        {% csrf_token %}
+        <input name="next" type="hidden" value="{{ request.path }}"/>
+        <label for="header-language-switcher" class="visually-hidden">{% trans "Language" %}</label>
+        <select id="header-language-switcher" name="language" class="form-select form-select-sm" onchange="this.form.submit()">
+            {% for language in languages %}
+                <option value="{{ language.code }}" {% if language.code == current_language %}selected{% endif %}>
+                    {{ language.code|upper }}
+                </option>
+            {% endfor %}
+        </select>
+    </form>
+
     <a
         tabindex="0"
         aria-label="{% trans 'Open Search' %}"
@@ -22,4 +39,3 @@
 <div class="alert-messages-header" aria-live="polite">
     {% include "oscar/partials/alert_messages.html" with messages=messages %}
 </div>
-