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Fragment of a discussion from Help talk:Embedded format
There is also another issue. The translation source as well as the clean clone of the translation source are fed into the feed. This should not happen for the latter. Here on this wiki I added another helper property "Is duplicate page" to be able to distinguish between the two. I guess I will for legacy reasons have to add some magic to the news template to prevent the "News date" property from being used. I will have a look.