Alternate links for multilingual sites

Needs the Winter.Translate plugin. Add the components like this:

[localePicker]
forceUrl = 1

[alternateHrefLangElements]

Code for your html head

{% for locale, alternateUrl in alternateHrefLangElements.locales %}
      <link rel="alternate" hreflang="{{ locale }}" href="{{ url(alternateUrl) }}" />
  {% endfor %}