[Zope] i18n: how to use it in zpt's without CMF&Plone?

Hi, how to use i18n (with Localizer) in zpt's without CMF&Plone? (State of the Art?) Is something like: <span i18n:translate="string:my_message" > You are here: </span> possible? (zope 2.6.2 or 2.7. without CMF&Plone) I found info about the use together with CMF/Plone but nothing without and I know how to use it this way: <span tal:replace="python: here.Localizer.i18n('my_message:')" tal:omit-tag=""> Sie sind hier: </span> But I would prefer the i18n:namespace-syntax and flexibility. May be patching zope is an option for that? -- Any hints would be great, Elena