Sure you can. Why can't you help the chapters draft their bylaws for the general things that do not require specific legal knowledge of that particular country? Surely ChapCom has a relatively standard framework that they can provide for the chapters to modify as they need. If not, that's a failure on the committee's part for not being proactive enough.
From my experience with the (second) UK chapter, a Wikimedia framework
would be pretty useless. Most of the governing documents of a charitable organisation are determined by the relevant laws. We started with a framework from the UK charity commission and modified that to suit our needs, I would expect other countries to be similar.