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.

[Carlton Gibson]

This might be the intelligent tracking protection — it doesn't send the cookies after a-certain-number of redirects. 🤔

Can I ask: if you refresh, is the language then-set? This sometimes happens with logins, but when I've seen it, the login has worked, it's just that the cookie wasn't sent for the final redirect request, and so refreshing then sends it.

Was this working previously? Or are you only implementing it now? (Not sure if this is something we'd be able to work around... — short of Use less internal redirects... 🤔)

[Carlton Gibson]

I'm going to Accept as ​The set_language redirect view docs have this exact form, so we'll need to review if a note or such is needed even if we can't suggest a different flow.