[[Translatewiki.net_languages]]
There is nothing special in translatable pages, except changing them generates work for translators :)
Yes, I agree, it is best not to change pages already set up for translation. That is why I thought that it might be possible to change the existing link at 'fallback language', without changing the text. Would it be possible to change the link using a bot, so that there is no extra work for translators?
If neither of my suggestions are very satisfactory, it doesn't matter; I'm sure we'll find a good place for this page eventually.
I have changed the link on Special:SupportedLanguages from Translating:Process to Translatewiki.net_languages. The link is on the site-specific summary and so it is only visible to visitors who have English as their interface language. Is there a way to make this visible to others?