Timwi pravi:
Do I need to state that I translated this article from another Wikipedia? -> Yes, but an edit summary suffices for that.
Does the article text itself need to state that it was originally a translation from another Wikipedia? -> No.
I agree. This is the way I always mark my translations, eg. "translated from [[:en:Andorra]]" in the edit summary.
IMO the whole point of GFDL is to be able to track the original authorship, and an edit summary is a perfect place for this, because it is already meant for history (ie. you only go there if you're interested who wrote what).