Last modified: 2014-02-24 16:18:19 UTC
1) Pick a translatable page 2) Reach the /en subpage ("translation page") I. Observed: a "Translate" button is shown in place of the "edit" button, linking Special:Translate where then you're advised to pick a non-source language. II. Expected: the /en page can't be edited in any way, a better link target would be action=edit with "view source" as button label, as with protected pages.
In other words this is an edge case, exception to bug 35946 (which introduced the "Translate" tab).
What about a regular "Edit" link pointing to the equivalent source page? Users might end up in /en pages without noticing, and seeing a "View source" link might confuse them.
"View source" is the regular label of the regular edit link when you can't actually edit.
Sure, but the fact is that users can edit the English text they are seeing. Only not in that /en page but in the source page that has exactly the same content. We can try to explain to potential editors the weirdness of the "English translation of the English source text" so they understand where they need to go, or we can simply provide them a shortcut labeled "Edit" to get them started.