Is Aptitude upstream?

[Hannie]

On https://translations.launchpad.net/ubuntu/maverick/+lang/nl/ I find 
many templates that should not be translated by us, Ubuntu Dutch 
Translation Team. With Gnome and KDE it is not so difficult, because it 
is usually in the name. But with others I am not sure if we should 
translate them or not. One of them is Aptitude. Is this upstream 
(Debian), or not?
https://translations.launchpad.net/ubuntu/maverick/+source/aptitude/+pots/aptitude/nl/+translate?field.alternative_language-empty-marker=1
In fact, only few of the 1340 templates are NOT upstream (e.g. 
(K)Ubuntu-docs, software-center, app-install-data).
Would it not be a good idea to mention in the list of templates whether 
it is upstream or Ubuntu?
Hannie Dumoleyn