Ah well. Thanks for your help anyway!
It makes for a good feature request though : is it possible to add an action to the page list menu so that I could select a page in each language, and select “Link together”?
Hmm, having searched, it may have to wait a while : http://core.trac.ww.wp.xz.cn/ticket/16031
Would it be a future possibility, if that patch gets accepted?
