Well, if enough people feel strongly about potentially changing the word 'orphan' into something more commonly accepted, I guess we could always make it into a proposal and see how the Sanctuaries vote?
Common word in english would be "sponsored" but it sounds like a bit corporate. In Spanish we use the word "apadrinar" which means "sponsor" too, but also comes from the word "godparent" and sounds better like if you were the virtual "godparent" of the children.