[author] token for anonymous

hi

can anyone tell me where to set the [author] token for anonymous users.

i setup my messages in german:

on admin/settings/activity/commentactivity

fieldset: Messages visible to the "Alle" role.
The general public.
(field: edit-commentactivity-comment-insert-all-wrapper)

is entered

Kommentar von [author] zum Beitrag: [parent-node-link]

seems like [author] is replaced with DIR which shows:
"Kommentar von DIR zum Beitrag grausame großeltern/eltern und jugendamt"

Where to change the [author] token for anonymous user

thanks a lot