Sometimes the good translations of Plone do not fit your usecase or screen space. Overriding the translations in a pre-buildout area was easy. All you needed to do is to put a directory i18n in your instance home containing a file custom-plone-en.po. The structure of the filename is important …
If you need to reference objects from big containers, the current ATReferenceBrowser product, which is bundled with Plone may not be your first choice. It is very slow with many objects and it is not very well tested, if at all. The at.referencebrowserwidget aims to be 100% UI compatible …