Don't load all translations at Zope startup - new filter

Plone translation maestro Hanno Schlichting has added a useful option to Placeless Translation Service. It can speed up the Zope startup time and reduce memory footprint a bit.
The philosophy is this: If your site is mono linguistic, why bother to load dozens of translations that you're not using at all?

It is quite easy to use. Just give the environment variable PTS_LANGUAGES a list of translation domains you are interested in. An example. I prefer a site to speak Danish, so I include this in the zope.conf of an instance:

<environment>
PTS_LANGUAGES da
</environment>

It works with Plone 3.1.1 - I don't know about earlier releases.