If you have a mixture of approved and unapproved versions of a versioned page, you may not modify any layers used in the approved versions. Conversely, you can modify any layers that are not used in the approved versions.
For example, if the EnglishWest and EnglishEast versions are approved, you may not modify the English layer, the West layer, the East layer, or the common layer.
You would be allowed to modify only the Spanish layer. The approved versions always use the layers that it was approved with.
Note: Previous to Prinergy 4.1.2.3, you were not able to approve individual versions of a versioned page; you were only able to approve all versions of a versioned page. Also, previous to Prinergy 4.1.2.3, you were able to approve versioned pages in the Pages view, which you are no longer able to do.