After installing the dutch translation almost all pagetitles are changed to (1)
I try to look in the languagefiles, but i cant find it. can someone point me in the right direction?

It looks like the braces {} were translated to normal brackets ().

There are quite a few language strings which define screen titles for content:
These strings exist so that you can prefix them (e.g. with the type of content), but by default they just show the content title.

Thanks Chris, i upload an original file of the english one, to dutch.
It is something with the cns.ini Now its ok.

Later this week i will start ranslating to dutch on transifex.