Are we stemming our spelling index?

I'm getting spelling suggestions that have been stemmed and I'm wondering if the copy fields functionality works the way we think it does. What if it processes the fields as text and THEN copies it into the spelling field?

  <!-- copyField commands copy one field to another at the time a document
        is added to the index.  It's used either to index the same field differently,
        or to add multiple fields to the same field for easier/faster searching.  -->
   <copyField source="title" dest="spell"/>
   <copyField source="body" dest="spell"/>

In that case, what we'd need is for the source fields to be non-destructive and perhaps to copy them into the text fields that we use for searching.