Abbreviations for page ranges

This may just be adding noise to the discussion, but there’s a thing I hacked into CSL-M that allows content to be embedded in a term. If that form is required everywhere for pages, I guess that with that it could be expressed like this:

<term name="page">
    <single>%s&#160;f.</single>
    <multiple>%s&#160;ff.</multiple>
</term>

(only if it’s not a form optionally chosen by the document author though)