Using _("translation") and variables in anchor title

[pymind]

Please add translation and variables support for anchor tag.

{% anchor sender _("Sender") %}

[dengyuanzhong]

This fork support variables.

https://github.com/summerisgone/django-sorting

[dengyuanzhong]

This one is better:
https://github.com/mirumee/django-sorting