Hi DesuDeus, I've made a plug-in attached here called ExportCentered, does it do what you need?

It makes a copy of each object and positions the copied object at the origin, then the copied objects will be the ones that are exported and when the export is finished the copied objects are removed. So your original objects are never touched.

Note that with multiple objects each one will be positioned itself at the origin so they will be stacked up on top of each other there, but if I understand correctly that is what you want.

- Michael