i18n set_language not working in Safari

[yopiti]

Trying to implement a session / cookie based translation selector.

This code correctly sets the language in Chrome (100) & Firefox (99.0.1), but not in Safari (15.4).

{% load i18n %}

<form action="{% url 'set_language' %}" method="post">{% csrf_token %}

<input name="next" type="hidden" value="{{ redirect_to }}" />
<select name="language">

{% get_current_language as LANGUAGE_CODE %}
{% get_available_languages as LANGUAGES %}
{% get_language_info_list for LANGUAGES as languages %}
{% for language in languages %}

<option value="{{ language.code }}"{% if language.code == LANGUAGE_CODE %} selected="selected"{% endif %}>

{{ language.name_local }} ({{ language.code }})

</option>

{% endfor %}

</select>
<input type="submit" value="Go" />

</form>

Request is made, its redirected to /i18n/setlang/ and back to the original page, but not switching language.