Background: We're currently showing the export links on all content namespaces, but this includes Page and Index namespaces (they're added by the ProofreadPage extension). It also includes Author, Portal, and (on some Wikisources) a 'Work' namespaces (e.g. Ligurian, Italian).
It'd probably be best to only show the export links in namespaces that contain single works, which is usually the main namespace.
It seems like it might be necessary to introduce per-wiki config to make this work, however.
[TODO: add details of which namespaces to include.]
- Only show export links in namespaces that contain single work