Revert "translate more, add dutch"

This reverts commit de4a14610437fa0a641e850ff3158c3921a8cfcc.

It contains a bug and the fix in
https://github.com/maartenkling/plonesocial.network/commit/99d1300da9cb888feac2ee02c8c10d5019468e05
doesn't apply cleanly.