[development] Translations License

[Fabiano Sant'Ana]

Gerhard Killesreiter wrote:

> It may surprise you, but each file of Drupal is copyrighted.

May be I'm just misunderstanding, but look here:
http://cvs.drupal.org/viewcvs/drupal/contributions/translations/pt-br/aggregator-module.po?r1=1.3&r2=1.1

I have some doubts, may I change/redistribute this file?
What is the license of the 1.3 version? GPL?

thanks,
fabiano.